10-13-2009, 05:19 PM
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I would say not to rinse the sponge with tap water. the chlorine in the water kills the stuff needed for biological filtration. Perhaps when you take water from the tank for water change scrub the sponge in the water taken out so you don't kill the necessary bacteria...
it is sort of off topic...and i am new to this whole thing...and you probably already know about it...but i just wanted to mention that...