Oxygen Block 20g

The Serenity slow-release oxygen block releases oxygen and also keeps your pH stable.

Oxygen Block:
*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 stabilise pH.