Do you mean as in a spot for growing out chaeto or other macros? The only concern I'd have in such a case is clogging the drain (assuming the overflow box is in use as an overflow box). As far as just putting in some sand or rubble for 'pods to hide out in, I think that could work.. interesting idea.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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