Requires a HYDROS System to operate The 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...

Requires a Hydros to Control the Unit The HYDROS Dosing Pump is a simple and affordable way to automate the addition of liquid supplements, trace elements, and two-part solutions to an aquarium...

Requires a HYDROS System to operate The HYDROS 2mL/min Dosing Pump is a simple and affordable dosing pump perfect for automating the addition of liquid supplements, trace elements, and two-part...