Hi all, all my water parameters are fine except for alkalinity. I have a 125 gallon mixed reef tank with fish and it has been up for over a year. My mag is 1400, calcium 480, po nitrates are both 0, PH is 82 temp 80.4 F. I use kent marine reef salt with RO/DI water. No TDS's. My alk is 7dkh and...