I looked at my fish tank.It was really very dirty. Io I cleaned out the filter sponge, gravel and bridge with soap, not knowing that it was harmful to fish. They were in there for a few hours but as soon as I saw something was making bubbles I took them out immediately and put them into new water (dechlorinated). They seems ok but I'm worried. What should I do and how should I get the soap residue out of my tank?
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Refrigerator Filter