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What is supposed to be alive in the water column and can new water be cultured before a large water change?
I’m wondering if mixing new water outside adding a little old tank water and letting it grow in the sun for a few days before performing a large water change is a good idea or not?
I’m wondering if mixing new water outside adding a little old tank water and letting it grow in the sun for a few days before performing a large water change is a good idea or not?