i never went with bio balls, i had about two hundred that came in sump that i bought and i used them during first day or two of setup cause they worked great catching all loose debris from tank switch. i had three tangs in my 125 but now just 2 my yellow and sailfin, have no luck with blue hippo's. my new tank has 2 scopas and bristle tooth tang.
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Darrick
slash member
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