Ca
Now when i have a stable CO2 level and found out that it probably was the snails who used the carbonate by taking up calcium carbonate i begun wondering if i also could have a problem with missing Ca, I have had problems with deformed and stunning growth for a long while and maybe it could be due to missing / instable Ca level, I will put in 20ppm Ca between water changes for a couple of weeks and se what happens.
Otherwise the growth has been better since i raised the kh-level and got a stable CO2 level.
