You could do a soft restart, by that I mean getting all the rock and sand out of the tank and replacing your sand cooking your rock and things should turn around. I am really sorry about your diatoms. I've had it before and had to scrub all the rocks. It's abit if work but it may pay off in the end.
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Always looking for the next best coral...
90g starphire cube/400mhRadium20k/2 XHO/2x27w UV/2x39w T5/ 3 Trulumen led strips
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