HYDROS Dual Inline TDS Sensor Test Kits Your protein skimmer must be

Your protein skimmer must be plugged into a HYDROS power source

Included in the Box:

You don’t need to purchase a new lid for your skimmer or modify the collection cup in any way

so make sure you have enough room for this leggy crab to move around

Solenoids - 1/4in water and CO2 control

HYDROS Dual Inline TDS Sensor Test Kits Your protein skimmer must beDual Inline TDS Sensor The HYDROS Digital Inline TDS Meter has two sensors to monitor the water quality of any RO DI system. The corrosion resistant titanium sensors will provide years of trouble free readouts. This device plugs directly into any available HYDROS Control Sense Port and requires no additional power source. Features: Simple Installation (includes 1 4in push connect fittings) Two High Quality Titanium Sensors Small & Compact Design Easy