Greetings from vietnam

Welcome to reef2reef!!!!!
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Don't know what NO4 is (Nitrate is NO3, nitrite is NO2, phosphate is PO4, but 200ppm would be incredibly high), but it looks like there is a nutrient issue of some kind. I'd increase filtration or decrease feeding in the longer term but start with a big water change or two to normalize those numbers.

Also your magnesium is low - I would aim for 1200 -1400 ppm - and this will negatively effect corals like montipora first.
 

IF YOU HAD TO TAKE A REEFING EXAM, WOULD YOU PASS?

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    Votes: 3 4.3%

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