does anyone know how often you should change out your GFO? It was tumbling when i first put it in but after a week the GFO seems to stop tumbling? does it mean its time to change it out?
my tank is completely lps and i run carbon/gfo 24/7...on my package for two little fishies gfo, it clearly states that you DO NOT want the gfo to tumble because it breaks it up into fine particules and loses its ability to absorb. My gfo does not move at all in the canister...my 2 cents