Hello reefers I am an serious issue with my alkalinity/DKH it high I started off topic Marin salt then went to friz salt cuz I got 6 boxes for 200 and now for last two months I have been using instant ocean regular salt mix and my dkh is still high I have been doing big water changes to drop it and it seems to say the same!! I tested it tonight it was 18.3 but my corals are doing fine!! By the way I am not dosing anything at all water changes only!!! I need help to get this issue resolved