A well developed and balanced filtering system removes all the toxic ammonia
M size - 12mm x 12mm
L size - 17mm x 17mm
$8.00A natural filter media which effectively absorb ammonia, nitrogen, chlorine and prevent the increase of NO2. Remove the odour caused by some bacteria and increase the oxygen dissolving rate in the water to make high density fish keeping possible. Also it can absorb the SHO directly to reduce the harmful affection result from long-not-changed water.