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mostly stability:
consistent alkalinity, calcium. magnesium..
low nitrate and phosphate.
good lighting
supplements work... but not for everyone. some people run their tank ultra low nutrient. So they need supplements to bring out coral color. If you have high nitrate/phosphate and consistent with water change, chances are those supplements won't do much.
I've used Red Sea ABCD. ok results. nothing impressive.
Switching to "Korallen-Zucht Pohl's Xtra Special". Heard many good things about it. I keep my system nutrient very low so I dose some supplements.
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560gal in the making
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