Ideal water condition for Marimo only tank?
I have a tank with Marimo only and nothing else. What are the ideal water conditions (pH, GH, KH, etc) and fertilizers for fastest growth?
I am starting with RO water because my tap water varies too much. To that, I add Seachem Equilibrium and Potassium Bicarbonate until GH ~6 and KH ~6. Then I add a few drops of Nilocg Thrive+ until the nitrate level is what I want (maybe around 20 ppm or so - no particular reason). I also have LED red / blue grow lights and the ability to add CO2 if I feel like it.
Since Marimo are slow growing, it is hard to tell if anything is "working", but I think there are two problems. One is that the Seachem Equilibrium leaves a layer of brown precipitate on the bottom which is unsightly. I would rather have something else to increase GH. Second, my Marimo doesn't seem to photosynthesize as much as other pictures I have seen on the internet, where they are totally covered by bubbles
(of O2). Even when illuminated by the grow light, mine only develops a few bubbles on the bottom, but at least it does float up. I wonder if something is holding it back, or maybe I just have a special breed of inert Marimo...