First off what are you levels at for cal, alk, mg, ph and eanything else you are dosing. If you are not testing for dont dose it. Minor trace elements ime really dont need to be does and are replenished with water changes using a quality salt mix. Cal, alk, mag, P and K are all you should be concerned with. Having low but detectable levels of No3 and Po4 are important to coral color and health. Proper lighting plays a key role as well as does strong random flow. Get good test kits like Salifert, Hanna, Elos ect keep the important elements at nsw ranges, keep No3 around 3-.8ppm and Po4 1-.05 ppm I have found keeps a nice balance and colors will improve. Lots of well fed fish, strong lighting and flow and a good skimmer are important.
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