Hello all I am having some trouble with my Kh being a little high and cal/mag being a little bit low. About a week ago I went to test my water at LFS because my corals were doing horrible and my kh was through the roof around 330 alk. I have done a series of water changes to get my tank back to its normal kh of 12 but would like to lower it to around 8 or 9. I would also like to slightly raise all my other parameters so all suggestions are welcomed.
PH 8.0
Kh 12
Calcium 320
Magnesium 1300
PH 8.0
Kh 12
Calcium 320
Magnesium 1300