hey there, activated charcoal is a filter medium which when rinsed under water it ‘activates’ and u can hear a slight buzzing sound (kinda like rice bubbles and milk lol) Basically when its activated it helps reduce toxics in the tank water but will not get rid of all, its just an aid. And remember to always do regular water changes… Got any more questions? message me on www.myspace.com/wahbeagle Cheers! :oDplus++it fine, black, odorless and tasteless powder.. made up from wood or other material expose in high temperature.. activated charcoal is pure carbon..




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