Pacific Sun Lighting Sentry ATO DC Version Aquarium Dosing with DC Pump

It works well but none of the mounts work with a tank that has a rim - only made for rimless tanks. I have the sensor jammed between the aquarium wall and my 'fuge pump. This also makes it impossible to adjust the height as I am limited by the top of the acrylic on the sensor piece.It works as advertised and keeps the water at a constant level. Now that I've moved to a planted tank, it makes water changes effortless. Take out the old water and hold the button on the unit until it goes to purple and it refills the tank and then goes back to being a normal ATO.I'd love to give it more than 2 stars but the fact that I can't mount it to my tank makes that a deal breaker.