Aquarium Oxygen Block 20g

Oxygen Block 20g is suitable for all freshwater aquariums and ponds. The activated Oxygen Block when placed in the water will slowly dissolve and release ingredients that will help maintain a healthy environment for your fish. As the block dissolves it will replenish the oxygen supply in your tank. Replace Oxygen Block with a new one when it was dissolved. For healthy fish, change aquarium water regularly and maintain water temperature of 22-27C with a pH value of 6.8-7.2.