Do you have a copper test kit to monitor the levels? Since you are keeping this fowlr
and don't care about mobile inverts then dosing the main can't hurt too much but you still end up dosing healthy fish which stresses them.
Best of luck to you in the future with new stock. Personally I'd get a larger QT tank (30+ gal
) in case you need to QT your whole tank for a couple of months. I keep a bio-wheel spinning on the main tank to transfer to the QT for instant bio-filtration if needed.