Neptune Systems Apex PM3 Dissolved Oxygen, Temperature, I/O Expansion Pumps & Powerheads Fine and Coarse pads specifically

Fine and Coarse pads specifically designed for your filter

Purigen® darkens progressively as it exhausts

This is best done outside and away from children

Clear-View Collection Cup: removes easily for emptying and cleaning

low palatability

Neptune Systems Apex PM3 Dissolved Oxygen, Temperature, I/O Expansion Pumps & Powerheads Fine and Coarse pads specificallyReal time Monitoring of Dissolved Oxygen in Many Aquariums is a Great Safety Net Many marine aquarists only give the oxygen content in their aquarium water a passing thought, not fully understanding how the level of the Dissolved Oxygen (DO) in their tanks can affect their entire tank population. In one way or another, everything (fish, invertebrates, corals, algaes, bacteria) in the oceans and in marine aquariums react with oxygen. Most of the living