you want a tank to be as level as possible, but from my past experience, my 5 footer slanted about that much from one side to the other, and i had no probs
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RSM 250. Clownfish, Fox face, Blue tang, Yellow tang, Kole tang, Clown tang, Coral beauty angel, French Angel, splendid dottyback. CUC, softies, lps, sps.
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