I think it would be fine if as oranda says, you have some water movement. Mine are in a clawfoot bathtub with some floating leaf plants. I rigged the filter so the outlet goes to the other end, up a couple of concrete blocks and over those like a waterfall. I also float a plastic dish of plants on the surface and that makes a place they can find DEEP shade. When I water, I also put a little cold hose water in the tub. They are doing great and BREEDING like crazy.
You can plumb the filter with drip irrigation tubing and make almost anything into a waterfall.
That 82 isn't so bad when we have the outside temps running at 101 for weeks on end as it has been this year.

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