I dose Seachem Fusion one and two every other day, but I dose a little under what is recommended on the bottles. I have an RODI system and check the parameters before adding it. I use Seachem Reef Builder to raise the alk and ph. Is it possible I just overdosed it?Best option is water changes, have you been dosing alkalinity? I would also check the parameters of your NSW to make sure it isnt a bad batch