Our rankings are cleverly generated from the algorithmic analysis of thousands of customer reviews about products, brands, merchant's customer service levels, popularity trends, and more. The rankings reflect our opinion and should be a good starting point for shopping. As an Amazon Associate we may earn from qualifying purchases. We may receive a commission from purchases made through links on our site, which will help us continue to provide you with value.
Best Choice METAK 
5 Pack Water Leak Detectors for Home, 100dB Water Sensor Alarm for Basement, WD60 Flood Leakage Detection Devices for Pi Leaking & Dripping: 2 water sensitive probes on the front for monitoring pipe/drain drip and 4 rear probes for detectionRUIKORING 
WiFi Water Leak Detectors 5 Pack, 120dB Adjustable Loud Water Leak Sensor, Wireless Wi-Fi Water Leak & Drip Alarm, App A Reliable 2.4GHz WiFi Connection: This smart water leak detector set supports 2.4GHz WiFi networks only. Effortlessly conMengshen 
Mengshen WiFi Water Leak & Water Level Detector, 2-In-1 Tuya Smart Sensor Alarm Loud Volume APP Alert Monitoring with 6. 💧【Dual Sensor Water Alarm】2 in 1, including water leak probe and water level probe. It can not only detect water leaks,Hepzest 
Hepzest Smart Life Leakage Sensor Water Leak Detector Water Linkage Alarm App Remote Monitoring Water Leak Detector 2. A water immersion sensor that detects water leakage in the environment in real time.Whenever and wherever you are, onBest Value zauzau 
Zauzau Water Leak Detector, Zigbee Water Detector Sensor for Home, Battery Operated Water Alarm, Zigbee Hub Required, Su Real-time water leak detector —This intelligent water leak detector is equipped with a high-sensitivity sensor. High sen17% Off TP-Link 
Tapo TP-Link Water Leak Sensor, Home Security System, Real-Time & Accurate, Built-in 90dB Adjustable Siren, IP67 Waterpr Designed to Fit Everywhere – Place in any location with its elegant design.eMagTech 
eMagTech Water Leak Sensor Water Leak Sensor Detector 120dB Water Leak Alarm Detector Water Overflow Alarm Detector for Powerful Alarm: Boasting an ear-piercing 120dB alarm sound, the device ensures attention and action. The alarm persistsAzdBvae High / Low Water Level Sensor Detector Alarm 120 dB Red Strobe Siren, Adjustable Alarm Volume, Sump Bobber Water leak Se 【High and Low Dual Probe Sensoe Design】- It can detect water shortage(low level) or overflow(hige level). You can choosemeross meross Smart Water Detector Hub Needed, Leak Detector with App Alert, Smart Water Alarm Replaceable Batteries, Interlink Meross Hub Required - Package does not contain hub. Please get a Meross hub first. Meross offers a variety of smart prodmeross meross Smart Water Detector with Hub, Smart Water Alarm with App Alert, Water Leak Detector Replaceable Batteries, Wirel Meross Hub Required - Package does not contain hub. Please get a Meross hub first. Meross offers a variety of smart prodX-Sense X-Sense Wi-Fi Water Leak Detector, Smart Water Sensor Alarm, Water Detector Alarm with 1700 ft Transmission Range for Ki Ready to Use: Download the app, connect the devices to the app via the 2.4 GHz Wi-Fi network (incompatible with 5 GHz) a17% Off UanTii UanTii Smart Water Leak Sensor with Sound Alarm Tuya WiFi Water Overflow Level Detector Wireless Flood Leakage Sensor Re 【Two monitoring modes】 water leakage monitoring, low water level monitoring.Even if you are not at home, you will be notPanv Overflow Alarm, Long Cable Detect Water Leak Sensor for Home Kitchen Bathroom Water leakage detector, when the probe detects that the water exceeds the standard, it will immediately sound a 120dB alLancoon Lancoon Cordless Water Detector 100dB WiFi Alarm Place Anywhere Leak Sensor for Bathroom Kitchen Under Sink Battery Oper 💧【Instant Dual Alerts】Our WiFi water leakage alarm features a loud 100 dB siren combined with Tuya app notifications, e15% Off Jectse Water Leak Alarm, 85 DB Household Wireless Water Leak Detector Sensor 9V,ABS Plastic,Flood Spot - Next to Bathrooms, Bas Automatic and high sensitivity. Once its three contactor touches the water, it will immediately send out a 85 dB alarm.UanTii UanTii Smart Water Leak Alarm Sensor Tuya WiFi Water Leak Detector Flood Detector with 100dB Loudly Alarm Sound Works wi [APP Remote Control] Works with Smart Life/Tuya Smart App; Receive alarm push remotely at any time through the mobile phJectse Jectse Water Leak Detector, 13000X Sound Amplification Wireless Underground Water Pipe Leak Detection Device with Headph Adjustable Volume: Easily adjust the volume to a comfortable level, preventing excessive sound from irritating the eardrSwitchBot SwitchBot WiFi Water Leak Detector, Smart Water Sensor with 100dB Adjustable Alarm&App Alerts, IP67 Waterproof, Detector Real-time Notifications (No Hub Needed): After connecting to Wi-Fi, you will be able to receive real-time email and appGeevon Geevon 4 Pack Water Leak Detectors, 100dB Water Sensor Alarms Flood Detector for Basements, Bathrooms, Laundry Rooms, Ki LOUD 100DB WATER LEAK DETECTORS FOR HOME- Each water sensor alarm leak detector features ultra-loud 100dB alarm audio whLancoon Lancoon 2 Pack Water Leak Detector 100dB Alarm with APP Alerts WiFi Smart Sensor for Basement Pool Aquarium Tank 6.5ft C 💧【Dual Alarm Modes】Either via 100dB audible alarm on the body or via instant app notification via Smartlife/Tuya app (wSpacnana High Efficiency Water Leak Alarm Detector 120dB Water Level Alarm for Kitchen Leaks Solar Heaters Flood Detection Leak S [ 120db Alarm] : Suitable for kitchen and solar water heater leaks, emitting a continuous 120db alarm sound to alert useNULETO Nuleto WiFi Water Leak Detector 1s,Water Detectors & Alarms,Water Leak Sensor with SMS,Phone Call,APP Push,492ft for Hom Whole-Property Coverage: 1 Smart Gateway can manage up to 99 Water Leak Sensor over 150m/492ft – perfect for multi-roomRUIKORING 5 Pack Black Water Leak Alarm Detector, 120dB Loud Alert Water Sensor, IP66 Waterproof, Sensitive Leak and Drip Alert, E Compact & Portable Design: Our 5-pack water sensor alarm leak detector works independently no-needing Wi-Fi, Bluetooth,Lancoon Lancoon 2 Pack WiFi Water Alarm 100dB with App Alerts Smart Flood Detector for Pool Tank Aquarium Floor 24 Month Battery 💧【Instant Dual Alerts】Our WiFi water leakage alarm features a loud 100 dB siren combined with Tuya app notifications, eHojellyTek Ultrasonic Level Sensor with 2.4G WiFi,Non-Contact Liquid & Solid Level Monitor,Tuya Smart & Smart Life APP Remote Contr Real-time remote monitoring via dedicated APP, check liquid/solid level data anytime and anywhereLancoon Lancoon WiFi Water Leak Detector with App Alerts Adjustable 100dB Alarm Smart Home Device with 6.5 Feet Detection Line f 💧【Dual Alarm Modes】Either via 100dB audible alarm on the body or via instant app notification via Smartlife/Tuya app (wmeross Meross Smart Water Detector with Hub | Water Leak Sensor WLAN IP66 | Up to 100 dB Sensor & App & Hub Alarm | Smart Water Smart water leak sensor with high sensitivity and quality: this WiFi water leak detector has highly sensitive and reliabMETAK Water Leak Detector Sensor Alarm: Home Water Flooding Monitor Smart Sink Overflow Monitoring Adjustable Wet Moisture Ale Drip & Leak Alerts: Water leak detector alarm is designed with 4 rear water leakage detection probes and 2 front drip prLSENLTY LSENTLY Water Leak Detector Supports 5 Years Standby Time, LED Indicator&100dB Leak Alarm, Self-Test Function&Low Batter 【Ready to Use Out of the Box】LSENLTY water leak detectors come pre-installed with batteries from the factory, requiringGeevon Geevon Water Detector Water Alarm Pack of 10 100 dB Water Alarm Water Sensor Alarm Battery Operated for Basements, Bathr LOUD 100 dB water alarms for home - Each water alarm leak detector has ultra-loud 100 dB alarm audio, which is loud enouGeevon Geevon Water Detector Water Alarm Pack of 10 100 dB Water Alarm Water Sensor Alarm Battery Operated for Basements, Bathr LOUD 100 dB water alarms for home - Each water alarm leak detector has ultra-loud 100 dB alarm audio, which is loud enouMETAK 5 Pack WD61 Water Leak Detector for Home, 120dB Water Sensor Alarm for Basement, Leakage Detection Device for Under Sink [Drip & Flood Detection] Equipped with a top drip sensor and four bottom flood probes, the Water Leak Detector provides40% Off Eve Eve Water Guard (Apple Home) - Smart Home Water Leak Detector, 2 m Sensing Cable (extendable), 100 dB Siren, Water-Leak Eve Water Guard requires iPhone or iPad with the latest version of iOS/iPadOSRUIKORING WiFi Water Leak Detectors for Home 3 Pack, Wireless Smart Water Leak & Drip Alarm, 120dB Adjustable Loud Water Leak Sens Portable Design & Easy Installation: Our smart water leak detector sensors features a compact design, allowing for easyＢｅｓｇａ Ｂｅｓｇａ Water Level Alarm Water Detector, Easy to Use, Sturdy, Water Leak Alarm Water Overflow Alarm for Swimming Pool Tan 【Functionality】: This water level alarm alarm is designed to alarm you immediately when it detects an abnormal water levLancoon Lancoon WiFi Water Level Detector Tuya Smart Sensor Alarm Dual Probe Loud Volume APP Alert Monitoring with 6.5 Feet Dete 💧【Water Level Probe Version】Designed for water level management of water tanks, cisterns, fish tanks and other containeShurzzesj Shurzzesj Water Sensor Alarm Leak Detector - Water Leakage Detection Monitor Alarm Device For Home | Loud Water Leak And Excellent Leak Monitoring: This water leak detector for home is able to detect a slow drip from a pipe or an overflowingGeneric Water Pipe Leakage Monitor, Underground Water Pipe Leakage Detector, 70Ddb Powerful Sensitivity 20000X Sound Amplificati Powerful Sensitivity: ‑70Ddb probe head sensitivity allows users to detect tiny leakages in wall in a timely and accuratTHIRDREALITY THIRDREALITY Smart Water Leak Sensor KM1, Matter Over WiFi, 1 KM1-controller with 100dB Alarm & 3 Water Detectors, 3-Yea Matter Certified Compatibility: THIRDREALITY's Smart Water Leak Sensor KM1 has been certified by the Matter protocol. UtLancoon Lancoon WiFi Water Leak Detector with App Alerts Adjustable 100dB Alarm Smart Home Device with 6.5 Feet Detection Line f 💧【Water Leakage Probe Version】Adopting sensing technology to monitor abnormal leakage in pipelines, equipment or enviroMOCREO MOCREO SW2 Water Leak Detector Sensor with 95dB Alarm, Hub Required, No Subscription Fee, Home Wireless Flood Monitor fo PROTECT HOME FROM COSTLY WATER DAMAGE - Note: SW2 water leak detector can not work alone, it must work with MOCREO Hub(SFlood Buzz Water Leak Detector Alarm Flood Buzz Pro (2 Pack) Flood Sensor SIMPLE: Factory-installed battery means no setup required. Just set it & forget it.Roloiki Roloiki Smartlife app WiFi Water Sensor Water Leak Detector Water Level Leakage Sensor Alarm SmartHouse Voice Control Fl Smart Water Leak Detection：Detects water leakage and abnormal water levels instantly, helping prevent flooding damage inBlueAOQ BlueAOQ WiFi Water Leak Sensor Water Leakage Intrusion Detector Alert Water Level Overflow Alarm Tuya Smart Life App Rem 【APP Remote Control】Simple download APP "Smart Life/Tuya" on iOS and Android to add the device to detect the water levelRisinglink Risinglink Smart Water Level Monitor, WiFi-Enabled, Text/Email Alerts, Indoor/Outdoor Detector, Battery Powered, Stainle NO HUBS, APPS, OR MONTHLY FEES: Easy WiFi setup with no hub, no app, no subscription, and no monthly fee—just connect anBUBUCAM WiFi Water Leak Detector, Smart WiFi Water Detector, APP Remote Control Water Sensor for Kitchens, Basements, Sinks, and *Smart Life APP: Monitor and detect water leaks remotely via the Smart Life mobile app, provide timely notifications andTuehakny WiFi Water Level Detector, Intelligent Water Sensor Alarms, Separate 5M Dual Detection Line, Left and Right Dual Alarms, Exclusive design and technical innovation: the first separate 2-in-1 double probe construction that meets the requiremenJectse Jectse Ultrasonic Water Level Meter, Wireless Digital Tank Level Indicator with High Low Alarm IP65 , for Home Farm Indu [Ip65 Weatherproof Design] Built to withstand harsh outdoor conditions, the level sensor transmitter features an ip65 raMEIJUN RAYWE WiFi Smart Water Leakage Sensor Standalone Water Leaks Intrusion Detector Alert Water Level Overflow Alarm Tuya Sm ⚽Simple download APP "Smart Life/Tuya Smart" on the smartphone to add the device to detect the water level overflow, noTuehakny WiFi Water Leak Sensor, 80dBwater Sensor Alarm, Sump Pump Alarm, TUYA App Free Remote Monitoring for Water Leaks, SMS an Reliable performance: When the water sensor detects a leak or exceeds the preset limit, an 80 dB alarm sounds and warnsMETAK WiFi Water Leak Detector for Home with App Notification, 1 Gateway + 6 WD61 Sensor, 120dB Water Flood/Drip Alarm for Bas [APP Notification] When the water leak detector senses a leak, the 2.4GHz WiFi gateway instantly sends real-time alertsMETAK METAK Water Leak Detector Sensor Alarm: Home Water Flooding Monitor Smart Sink Overflow Monitoring Adjustable Wet Moistu Drip & Leak Alerts: Water leak detector alarm is designed with 4 rear water leakage detection probes and 2 front drip prU.S. Solid U.S. Solid Water Leak Detector - Water Alarm Leak Detect System with 1/2 Automatic Shut-Off Stainless Steel Motorized Ba Protect Your Property: The U.S. Solid water leak detector was designed to monitor any water leaks and make sure your proPeakloong Peakloong IP67 Water Immersing Sensor Tuya Zigbee Flood Water Leak Detector Smart Alarm Security Soaking Sensor for Smar Smart Connectivity: Utilizing Zigbee technology, allowing for real-time alerts and remote monitoring through your smartpResideo Resideo CHW3610W8001 WiFi Water Leak and Moisture Detector For Home, Smart Water Sensor Alarm and Freeze Detector, Water WiFi water leak sensor - When you're away, you can depend on the L1 WiFi water alarm leak detector to monitor temperaturEPTTECH EPTTECH Smart TLC 2326-WF-S Tuya APP Efficient Solar Panel Rechargeable Battery Liquid Level Monitor WiFi Water Oil Tank LONG MEASURING DISTANCE: 10cm to 2.9m(4 to 114 inches) from the sensor, which is suitable for different tanks.DIYables DIYables Water Sensor Detector for Arduino, ESP32, ESP8266, Raspberry Pi, 5 Pieces Used to detect the presence of water, water leakageQANYEGN QANYEGN Water Leak Alarm Detector, Watchdog Water Alarm, Overflow Leakage Sensor for Home Sink Fish Tank Pump (120dB Lou HIGH EFFICIENCY WATER LEVEL ALARM: The water level alarm detects overflow and leakage quickly, ensuring the safety of yoMengshen Mengshen WiFi Water Leak Detector for Home Smart Water Leak Sensor APP Notification No Hub Required Water Monitor for Ba 💧【24/7 Water Leak Protection Alert】 Triggers 75 dB alarm sound if detects tiny leaks or floods (even drips!) and sendsMETAK WiFi Water Leak Detector for Home with App Notification, 1 Gateway+10 Sensor, 120dB Flood/Drip Alarm for Basement/Kitche [APP Notification] When the water leak detector senses a leak, the 2.4GHz WiFi gateway (Not support 5Ghz WiFi) instantlyGeevon Geevon 6 Pack Water Leak Detectors, 100dB Water Sensor Alarms Flood Detector for Basements, Bathrooms, Laundry Rooms, Ki LOUD 100DB WATER LEAK DETECTORS FOR HOME- Each water sensor alarm leak detector features ultra-loud 100dB alarm audio whSone Smart One Sone Smart One Zigbee Water Detector 3.0 - Water Sensor - Compatible with Tuya & Smart Life - Water Leakage Alarm - Zigb Requires Zigbee Gateway - Intelligent Water Detector with Automation The Sone Smart One Zigbee Water Detector requires aFafeicy Fafeicy Liquid Level Transmitter TL-136 Liquid Level Transmitter Water Sensor Detector 12-32VDC 4-20mA Signal Output for Input level transmitter: High precision diffusion of silicon, more accurate monitoring of water level.SEWOART SEWOART Water Leak Detector Alarm with Flood Sensor and Drip Alert for Home Basement Kitchen Bathroom, Water Sensor Leak Water alarm sensor: 💦water leak detector, water sensor alarm flood detector for basements, bathrooms, laundry rooms, kiSuperEye SuperEye Underwater Metal Detector for Professional Adults, Precise Sensitivity 8.6"Coil, Small Object Filter,LED & Alar Waterproof Metal Detector, Submersible Up to 40 Meters (130 ft): Built for underwater use, this waterproof metal detectoEPTTECH EPTTECH Smart TLC2326P Remote Detector Display Screen Tuya Smart Life Mobile APP Liquid Water Oil Fuel Level Tank Monito Chuango Chuango WI-210 - Water Detector for Chuango Alarm Systems, Tamper Protection, Transmission Range 80 m The water detector is an important part of your Chuango smart home solution to protect your home from leaking liquids. TLancoon Lancoon Water Leak Alarm with 1.1m Probe 65-120dB Adjustable Sound Stainless Steel Sensor Low Battery Alert for Basement 💧【Advanced Water Detection Technology】Our water detector alarm features a 1.1-meter immersion detection line and stainlintendvision Geiger Counter Nuclear Radiation Detector - Portable Radiation Dosimeter Tester Beta Gamma X-ray Radioactivity Detector 【Nuclear Radiation Detector】Portable, personal & group use. Detect ionizing nuclear radiation Beta, Garma, X-ray. Quick,JINdanju JINdanju Wired Type Leakage Alarm Detector Water Sensor Leakage Alarm Detector Water Sensor Dimension:30x20x8mmLeopacat Leopacat Non Contact Liquid Level Sensor, Contactless Water Sensor Externally Attached Induction Switch Tank Intelligent Advanced Non-Contact Liquid Level Detection: Our state-of-the-art PNP output water level switch employs cutting-edge proAngoily Angoily Water Level Alarm Drip Leak Detector Water Leak Detector Water Detector Alarm Water Alarms for Basements Leak De Water leak sensor-- this alarm produces a loud sound to immediately draw attention to any water level issues.Candeon Candeon Underground Water Leak Detector, Water Pipe Leakage Monitor Water Leak Detector Machine Water Pipeline Leak Loca ★ Good Detection: The underground water leakage pipeline detection tool can quickly search and confirm the leakage locatShonmau High/Low Water Level Sensor Detector Alarm 120 dB Red Strobe Siren, Adjustable Alarm Volume, Sump Bobber Water Leak Sens Dual Bobber Probes Sensor Design - It can detect water shortage or overflow. You can choose to use one or both functionsGeneric Water Sensor Alarm For Home, Water Sensor Alarm Leak Detector | Water Leak Sensitive Detection Monitor For Basement,Leak Excellent Leak Detection - Discover water leaks from the start with our home water leak detector. With advanced drip andGeneric Water Detector Alarm for Home, Water Leak Detector for Home, Water Leak Monitor for Home, Water Leak and Drip Alarm for SUPERIOR LEAK DETECTION With our water leak detector, you will always stay one step ahead of leaks. Equipped with state-SENCKIT WiFi Water Leak Detector: Smart Home Water Sensor Alarm with App Notification, 1 2.4GHz Base Station + 3 Water Sensors, NEVER MISS A LEAK AGAIN: Compatible only with 2.4GHz Wi-Fi (not compatible with 5GHz); Connect to Smart Life/Tuya SmartPQWT PQWT Underground Water Leak Detectors for Home PQ125A Wall Pipe Water Leakage Detection with Touchscreen Earphone and Ca [Simple Operation] The PQ125A water leak detectors for home utilizes a factory-developed UI interaction system. Its toucGeneric Home Water Detector Alarm,Water Leak Detector for Home,Sensitive Water Leak Detection Alarm for Basement | Water Leak an EXCELLENT LEAK SEARCH - Keep up with leaks with our water leak detector. Featuring state-of-the-art leak and drip detectGeneric Home Water Detector Alarm,Water Leak Detector for Home,Waterproof Water Leak Detection Monitor for Basement | Loud Water EXCELLENT SELECTION & LEAK - Detect water leaks timely with our home water leak detector. Thanks to advanced leak and drXjdzineq 3.5mm Water Detection Electrode Type Water Leak Alarm Detector Sensory Cable Power Accessories Industrial Made with stainless steel probe, this leak detector is highly resistant to rust and has high water source detection sensShackcom Water Leak Detector 2 Pack, Shackcom Water Alarm 110DB, Wireless, Waterproof & Battery-Operated, Audio Alerts for Bathro Detects as little as 1/32 inch of water to offer an effective early warning systemaikoolwer aikoolwer Automatic Water Level Controller 220V 25A with 6.5ft Sensor Pump Float Switch for Water Tank Sump Pump Control Automatic Dual Mode Operation：Features both supply and drain modes for flexible water level management in various applicXjdzineq 3.5mm Water Detection Electrode Type Water Leak Alarm Detector Sensory Cable Power Accessories Industrial Made with stainless steel probe, this leak detector is highly resistant to rust and has high water source detection sensEC Buying EC Buying 20pc Water Level Sensor Detector Rain Drop Depth Detection for Arduino Accurately measure water level and detect rainwater drops with this high-quality Water Level Sensor, designed for easy iLXJLXD LXJLXD Flexible 3.5mm Leak Detector Probe Easy Installation 10℃50℃ for Kitchen Bathroom Warehouse Easy Installation Ideal for homeowners, business operators, and facility managers, this flood sensory provides essential protective againsLXJLXD LXJLXD Flexible 3.5mm Leak Detector Probe Easy Installation 10℃50℃ for Kitchen Bathroom Warehouse Easy Installation Ideal for homeowners, business operators, and facility managers, this flood sensory provides essential protective againsWilgure Water Overflow Alarm Water Immersion Alert System Sensitive Water Leak Sensor Flood Protection for Home and Office Protect your home from water damage with our residential leak detector with advanced sensitivity and instant leak detectIndependently published SMART WATER LEAK SENSOR The Complete User Guide: Everything You Need to Know to Install, Set Up, Use, and Maintain Your Generic Tuya Wifi Home Water Level Controller Sensors Water-level Alarm Device Swimming Flows Detection System Multicolor ⭐WF96L adopts linear isolation transformer for power supplys, nice performance dual processors inside, 8-bit MCU for locTertioi Home Flood Detector with Design Intelligent Leak Monitor for Basement and Laundry Room ABS Leak Detector Made from ABS components, this device guarantees quick alerts and alarms via the smartphone appJoyzan Non Contact Liquid Water Level Sensor, Contactless Induction Switch Detector Water Level Switch for Airtight Container T Non Contact Level Sensor: Intelligent non contact liquid level sensor uses advanced signal processing technology and higGeneric Tank Level Sensor, Compact, Portable, – Ergonomic Elegant High-Performance Stylish Sleek Liquid Indicator External Water Non-Contact Inductive Detection: Our liquid level sensor provides Non-Contact Inductive Detection to accur ately detectCryfokt Water Level Sensor Detachable High Stable Stainless Steel Water Level Detector for Water Medium Water Level Monitoring ( Input level transmitter and high‑ diffusion of silicon for more accurate monitoring of water level.Norpolifomor Norpolifomor Indoor/Outdoor CO2 Carbon Dioxide Detector, 3-in-1 Portable CO2 Monitor,Temperature & Humidity, CO2 Meter w Real_time Air Quality Meter:This air quality tester applies for indoor/outdoor environments which allows you to monitorEPTTECH EPTTECH Smart TLC2326 Tuya Liquid Level Monitor APP Oil Water Indoor IP65 Alarm Sensor Household Indicator Ultrasonic We LONG MEASURING DISTANCE: 10cm to 2.9m(4 to 114 inches) from the sensor, which is suitable for different tanks.