Salinity Tester HI98319 Filter Socks but if you do not

but if you do not have a controller

Replaceable Temperature Probe

BioPellet Reactors

and remove activated carbon and any chemical filtration for the duration of treatment

Flow Monitoring

Salinity Tester HI98319 Filter Socks but if you do notDesigned for Simple Aquarium Salinity Testing Hanna Instruments HI98319 Marine Salinity Tester measures electrical conductivity (EC) to determine the salinity of natural and artificial seawater. Within seconds, the salinity and temperature are measured, and then using the temperature reading, automatically compensated and displayed on the easy to read LCD screen. Ensuring the proper salinity in your reef tank allows your fish and corals more time to