Saturation Levels of CaCl and MgCl in RO/DI Water

[Todd]

I think Randys recipies are near saturation because it sure takes alot of mixing, and a little heat, to get them fully disolved.

Thanks! That was the info that I was looking for. I am sure it wouldnt have taken me long to figure it out by trial and error, but I figured why bother if someone else had already figured it out.

Originally Posted by littlesilvermax

FWIW calcium get used up at a much higher rate in your tank then magnesium.

What salt are you using, what is the magnesium and calcium level of that salt?

Thanks for the info. I am aware that the uptake levels will be different, and I am planning on using different dosing schedules for CaCl and Mg to address that.

I am using IO salt, the Ca level is usually 380 and the Mg level usually tests around 1100 using a Salfart test kit.

Here is a problem I am having though, perhaps someone will have some insight into: I have tested my wc water and found a Mg level of 1080, I then proceed to add 85g of MgCl and 85g of MgSO4 to bring my Mg levels up. I noticed no precipitate. After letting my heated water change water sit mixing, I tested my Mg levels again, only to find them unchanged and still at 1080.

I tried to do the same thing with my next batch of water change water only to have the same thing happen (levels the second time were 1020 starting, added 56g MgSO4 and 66g MgCl along with 17g CaCl).

Is this a problem with my test kit? Do the test kits work in a way that they will not measure Mg added in this way? Could it have precipitated out and I not noticed? Anything else I am not thinking of?