A hole in one of the original boxes (of the two that were required at purchase) leaked soot on the third item ordered as a gift. >: (There is a lot of free charcoal in there when I touch the second pack. I will be returning it as it is clearly not the same quality as the ones I bought from local pet supply suppliers where I had the MINIMUM AMOUNT of free charcoal ( Why? BECAUSE it is necessary in the filter to do the job for my fish!) I don't risk carbon particles (no dust! grit/particles) throughout my living space if they have to be in a cartridge for use!
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