I think you need to hold off on all new fish. Iridescent sharks do NOT lie around normally. I think something is very wrong with your water quality. Iridescent sharks normally are always on the move.
Optimist;810177; said:Don't believe what they say at wal-mart. I personally don't get fish from walmart, petsmart, anything with "mart"... since they tell you stuff like that just to make a sale. Its unfortunate because many fish end up cramped in small tanks.