I am probably being paranoid but I bought an Eshopps (sp?) sump for my new 60 cube. The sponge that fits between the chambers to reduce bubbles has a very strong chemical type smell. Before putting it online I rinsed it in hot water for 10 minutes or so. Even now though when I open the stand doors I get a faint smell of it. I have tested the water in the tank (no fish or corals yet) and everything tests fine. I think I will put one small colony of zoas in there and see how they do before the big change over. Good idea?