well if i were you i wouldnt go back to that shop again except to buy food cause they dont have a clue, you may get away with buttis while theyre bout 2-3" but after that watch out,if completely destroying ya tank isnt bad enough they'll kill any other fish in the tank with em, you may get someone say" mine was ok" but this is far from the norm'...think lean mean killing machine + you wont be far off

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