Originally Posted by
crustaceon
Your salt mix is probably high in MG, so the more water changes, the more you’re essentially dosing mag. It also sounds like you’re doing A LOT of things, which in total is going to be counter productive to having a successful tank, especially if those things aren’t critical changes. The simple thing to do here is switch to a salt brand that has less MG (1600 isn’t going to hurt anything btw) and in all honesty, I’d stop nopox dosing and running carbon and chaeto. IMO it’s extreme overkill and is only going to cause you headaches in balancing nutrient levels which is actually more critical than balancing alk/cal/mg. On a tank of that size, I’d ONLY do water changes and test nitrates and phosphates several times a week to make sure you’re not bottoming out your nitrates and phosphates. That way, you can adjust the weekly water change amount as needed and better dial in your required nutrient export. For reference this is the exact strategy I use on my 200g acro-dominant sps tank. I really doesn’t have to be so complex.
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