Red Sea 100 Micron Felt Fine Polish Filter Bag Material:100 Micron Felt This combined test kit provides

This combined test kit provides either 100 nitrite or 50 Nitrate and 50 Nitrite advanced colorimetric tests for marine aquariums

one of them being the production of the pink pigments in the soft tissue of corals

Can be attached to rocks or driftwood

Remove older or yellowing leaves as needed to maintain healthy growth

Red Sea 100 Micron Felt Fine Polish Filter Bag Material:100 Micron Felt This combined test kit providesProduct Details 100 micron felt filter bags are designed to provide fine polishing of water that is already low in particulate matter (mature aquariums). Filter Socks for Red Sea Reefer and MAX series of tanks. 4" x 10" with Plastic Ring