OK, so I tried some vinegar and so far nothing has happened, so I think I might just need to do a water change. the only problem there is that I don't really know how. I've seen Nathan do it a million times, but I don't know what I need to turn off and stuff before I do it. I'm also not sure if there's salt in the water downstairs, so I guess I might just need to mix it.
Would powerheads need to be turned off in order to do a water change?
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