I tried to raise my Mg recently to eradicate algae and it threw everything out of balance
I ended up mixing, testing and dosing NSW to appropriate levels, and then did WCs to fix the DT
Maybe lots of reefers are able to manipulate their tank params with spot dosing, but I'll never try to put one of the big 3 out of balance ever again
BTW, it probably didn't help me when my salt was mixing over 500 Ca
