Ca:Mg ratio question
Does anyone here did some research on what exact numbers of Calcium and Magnesium are good in the planted tank?
I'm looking for numbers of concentration in PPM (mg/L would be better) of these two elements. The ratio is loosely mentioned as 3:1 or 4:1 but exact concentrations are not that widespread. Did anyone here cared to measure concentrations to determine what are considered good numbers?
I'm using RO water only in my planted tank and I can see some mysterious melts on Ammannia Gracillis and now on Pogostemon Helferi. Both are suspected to be caused by an imbalance in either ratio or concentration.
I'm adding Ca in the form of CaCl2 and CaSO4 and Magnesium as H7MgSO4. Lately I added Mg only from PPS-Pro solution but I'm testing a mineral stone for birds which is said to contain CaCO3 and CaSO4 along other trace minerals which led me to believe I messed the ratio up.
Any info is appreciated, thanks!