Serenity Oxygen Block O2 20G

Serenity
Serenity Oxygen Block O2 20G
  • The active oxygen block will dissolve slowly in water and release ingredients that will help maintain a healthy environment for your fish.
  • As the block dissolves it will replenish the oxygen supply.
  • Replace the block with a new one when it has almost dissolved.
  • This product will also help stabilize pH.