sounds like it may be a good idea, but ill need something a bit larger than 700g for 4 pacu. add a zero to that, and we're talking 
so in my fx5, im removing the carbon, and keeping the filterpads, and prefilter, then loading the other 2 chambers with bio-max
so in my fx5, im removing the carbon, and keeping the filterpads, and prefilter, then loading the other 2 chambers with bio-max
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