I don't see the need to reuse my old saltwater or anyone for that matter, however to stir the pot...
UV sterilizer usage in a reef tank....comments that follow topics on such is but not limited to
It kills the beneficial bacteria
It destroys the beneficial bacteria
There's no need since it kills good bacteria and other good organisms
I know it can kill other micro fauna but this reply is only for the bacteria in the water....
But I agree with the statement(s) that the amount of free floating bacteria is small (unless a bacteria bloom occurs) compared to what is on the surface of everything.
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