- Reduces organic waste
- Maintains a biological equilibrium
- Improves nitrification
- Accelerates maturation process
- Reduces BOD / DOC / TSS
- Rapidly restores equilibrium
- Reduces filter and skimmer maintenance and cleaning How do I use PURE Marine? We recommend that you use PURE Marine as part of your regular maintenance programme. You cannot overdose with PURE Marine. To maintain crystal clear, healthy water add 2 PURE Marine balls per 25 litres of water once a week into your marine aquarium filter. Alternatively, place the balls in a filter bag and position in the tank or the filter in an area with good flow.