wow, strong bump. anyways, the worst thing i added to my 40 gallon was a flame angel. brought ich to the tank and wiped out the whole fish population.
worst thing in my 28 gallon was a half black angel. brought ich to the tank and almost wiped out the whole fish population.
needless to say, im not buying any more dwarf angels...
worst thing in my 58 gallon was sand, i should've left it bare bottom.
and my 5.5 is still in the works, and so far, the worst thing is the foam wall. its a PITA to make...
btw, i dont have anymore of those tanks, only the 5.5. the only reason being we moved and i had to sell all of it...