How bad is the phosphate?

Notsolostfish

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My tank has been running for over a year, my phosphate always been 0.16-0.22 corals doing great tested today, and its 0.36ppm. I noticed that calcification slowed down, my alk went up from 9.6 to 9.9 and 450 calcium to 480-490. Mag also. How dangerous is the situation? I would lose corals overnight?
 

Oldreefer44

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Don't think it is currently dangerous but you don't want Alk and Ca to keep climbing, As far as I know the phosphate number is unrelated to the others.
 

NonstopSoda

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I don't think you would lose corals overnight, everything is still within range. I would just suggest a 10-20% water change and see if that makes the phos go down.
 

boacvh

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I'd say high but not dangerous at all. Just work on bringing them down slowly.
 
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