Review on 🐠 Maximize Efficiency with the MagTool MT-360P Optical Sensor ATO for Reef and Fresh Tanks by Kristen Pack

This is a great affordable auto top up system for any size tank. I installed this in a 20 gallon tank containing clean ROV water. When the tank after vaping and the waterline passes under the tiny sensor, it activates the pump and fills it to the right level. The sensor is very small and unobtrusive. It's held in place by a tiny rubber-coated magnet to avoid scratching the glass. A great little addition for the serious plant or aquarium owner.