how far can you go with kalk in the make up water

correct, gave up on the standard RC / IO since the alk/cal were very high. Switch to regular red sea (not the pro) and couldn't be happier with the alk/cal/mag at 1.26 salinity
 
just checked my mag at the end of the day its at 1400 so I guess the water changes are enough right now.

1400 is fine. I used to chase mag at 1350, and dosed Randy's 2 part to get it right at 1350, when all the while my mag seems to settle naturally at 1300. But why bother? Per Randy's articles, anywhere from 1270-1350 is perfectly fine, and a bit higher is no problem either. Now, I would only dose if magnesium went below 1270.
 
What I'm trying to understand now is how much do you really need to saturate the water. Meaning once it starts settling on the bottom of the container that means you have maxed out the concentration of the mix, right?
 
damn good read a little old but still a good one. Think i have read this article at least 3 or 4 times by now. Funny you don't hear many people running just kalk any more, its all 2 part or reactors with kalk.
 
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