So I've been scratching my head trying to figure out where my magnesium has been going the last week. Finally checked my salt mix (Instant Ocean reef Crystals) and properly mixed salt water at 1.025 only comes out to 1230ppm. I like to keep it around 1300ppm. So obviously the problem is is I'm lowering my mag every time I do a WC. So how should I do this then? Should I be measuring the mag levels of my new water, calculating the dosage to bring the level up to my tank level, then adding that into my new water before I add it to the tank? Seems to be the only logical way right?