Neptune Apex Probe Module 2 Hydrometers & Refractometers Formulated to provide over 200

Formulated to provide over 200 million phytoplankton cells per ml

Straight design for standard aquarium plumbing jobs

Faster RO Production for Larger Tanks and Mixing Stations

It may be grape to azure or any shade between

or 80 gallons with a 30°F pull-down

Neptune Apex Probe Module 2 Hydrometers & Refractometers Formulated to provide over 200Neptune 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