Need help with potassium fertilizers
My tank is a Walstad tank and even though I feed my fish more than enough, a potassium deficiency always seem to pop to some extent. Aside from that, everything is well.
What I would like to know is how can I occasionally dose my tank with potassium without having to add phosphates, nitrates, etc.? My nitrates always stay in the 5-10ppm and phosphates at 1ppm. I know there is potassium sulfate but in Diana's book, it says that too much sulfate can cause H2S to form in the substrate and I'm not having much luck with finding potassium chloride.
Edit: mods, can you please move this to the correct subforum?
Last edited by MintyFresh; 07-29-2020 at 04:58 PM.
Reason: Wrong forum