Neptune Apex Probe Module 2 Hydrometers & Refractometers or 80 gallons with a

or 80 gallons with a 30°F pull-down

improper diet

Formulated to provide over 200 million phytoplankton cells per ml

then tighten the lock nut from the opposite side by hand

It may be grape to azure or any shade between

Neptune Apex Probe Module 2 Hydrometers & Refractometers or 80 gallons with aNeptune Apex Probe Module 2 The Neptune Apex Probe Module 2 adds salinity or conductivity monitoring, temperature compensation, six digital inputs, and AquaBus expansion to a compatible Apex aquarium controller system. PM2 Salinity and Conductivity Expansion The PM2 is designed for aquarists who want continuous conductivity or salinity monitoring through their Apex system. Salinity stability is especially important in reef aquariums, quarantine