Product description
2.Ammonia absorption stone
* Culture of nitrifying bacteria.
* Durable and not easily powdered.
* Stabilize the PH value of fish tank.
* Purify water and resist algae growth.
* Scientific mix, makes better filtering effect.
* Disintegrate the residual chlorine gas in the water.
* Applicable scope: top filter box, filter cartridge, outside filter barrel.