I've been using AquaForest Probio reefsalt, and my Magnesium has been way too high for too long, getting number of like 1460 using RedSea Pro test kits. I'm going to be switching to Fritz RPM salt this week, as I have had nothing but trouble keeping sps corals since switching to Aquaforest products. I have not dosed Magnesium in like 2-3 months yet it still remains in the high 1400s. No I have not tested freshly mixed salt water. Is there anything I can do other than a large water change to reduce magnesium? Should I even bother can it cause issues with sps corals?