I have an 50g non-CO2 tank to which I add each week ~5ppm GH (as CaCl2
and MgSO4) and 1/2 tsp NaHCO3 to maintain the GH ~120-150ppm and KH
50-70ppm (also adding a bit of K2SO4 and some traces). Since I'm not
doing any water changes, should I be concerned about sodium
accumulation (the fact that my discus are still breeding indicates
'probably not'). I'm considering perhaps switching to CaCO3, although
I've always been hesitant to use it in the past because CaCl2 and
NaHCO3 are so much more soluble and easier to work with. But I've only
been running non-CO2 for 3 months and previously I was running CO2 and
doing 50% w/c 1-2x per week so wasn't really worried about
accumulation at all. So should I be worried now?
Clint
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