Product description
suitalbe for fresh water and sea water tank
More than 10 times the ability to cultvate nitrifying bateria than normal bacteria house
Wash it with aquarium water before use, do not use tap or boiled water
Do not often change these rings. After six month used, change half of them and use new rings with the rest old rings
Wash it first, then use it directly into the filter. Immediately you will achieve the nitrifying bacteria which is indispensible for your tank!