So i have 1 on the floor in my laundry room next to my 160 gallon water vat just in case it sprung a leak. Well it came in handy today when the wife was multi tasking try en to rinse out a onez that my daughter had a blow out in, well she put it in the sink in laundry room and it plugged the drain after she walked away and then she heard the loud beeping sound from upstairs. Soo glad it wasn't the vat that sprung a leak cause id have never heard the end of it! She is glad the alarm was there cause it could have been alot worse cause she was on the way out the door for work! Id recommend these to all of us cause it may not be aquarium related that it saves! 