Certainly. Doubling calcium from 420 to 840 ppm is no more likely to cause calcium carbonate precipitation from seawater than raising the pH from 7.9 to 8.2,
Yes, I made a salt mix with over 2000ppm calcium, seemed stable (also had a DKH of 90DKH from bicarbonate). This was made with Tropic Marine classic and calcium chloride.
Yes. My test kits were altered by a mean person. My Salifert CA test kit only goes to 120 ppm.
To further my confusion I had what I thought a kalkwasser overdose which would throw chemistry way off as well.
I slowly added 351 ml (50 ml a day) of part B B-ionic to correct a false issue.
My Alk test seems accurate. But truth is everything could be incorrect. Magnesium as well. By making adjustments I stopped STN on a stylaphora. Polyp extension is good. Color is good. My GSP have grayish skin but good green color.
I’m making a 3 gallon water change in hope it helps.