artificial rock,, hazard?

glenn10

Member
I put an artificial rock in my QT to give the fish a hiding place. After day two, they started to be a little lethargic, so being the first two fish that I own and being that my 46 is cycled, I put them in the 46 and they seem fine.
Should I empty and refill the QT without the artifical rock or am I just being paranoid that it is saltwater safe? All readings(ammonia etc) seem fine. The rock was bought at Petsmart and I originally assumed that it would be safe(no metal objects showing) Advice please
 
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