Dosing - can't find the right levels.

[mark]

maybe slow down? With the dosing, water changes and supplementing going to be hard to figure things out.

Once you confirm your test kits and that the volume being dosed is what's expected, might try slowly manually supplementing levels, once stabilized, turn on the doser just to maintain your target levels.

If you're doing RHF DIY solutions there's a chart for how much a day for a guide.