Hydros Water Level Sensor aquael You can choose between several

You can choose between several preset programs

Behavior: Slow swimmers

Use any HYDROS device by itself or connect multiple devices as part of a larger automated aquarium system with NO single point of communication failure

and save approx

Hydros Water Level Sensor aquael You can choose between severalThe HYDROS Water Level Sensor is an optical sensor you can use for a variety of aquarium applications, such as sensing when your tank needs to be topped off or to detect when a dosing container needs a refill. It plugs into any Sense Port on a HYDROS device (like the Control 2 or Control 4) and does not require any additional power source. HYDROS Water Level Sensor Specs: Size: Diameter 0. 75 Sensor 0. 55 thick Magnet Mount 0. 25 thick Cord length 98"