I've learned the hard way but testing regularly is a must. I dose nano reef part a/b and one day stopped dosing and testing, boy do I regret that ... I lost so much color its not even funny. Getting a coral to color up has been a slow process. It like weight control in humans, easy to gain, hard to lose. Same with corals, so easy to lose color, hard to gain it back. It all starts with ur water chem.
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