Well lets start off by saying my tank is now about 6 months old and everything in it is healthy. Its a 50 gallon bow front with a fluval 304 external filter cleaned every 3 days, 50lbs of live rock and 40 lbs of live sand with no sump or skimmer. My light is only 3 months old, but it is a marineland led which i have heard is not very good. I have 2 clowns, a convict tang, a mandarin goby and a six line wrasse. I have lots of different corals and frags. for flow i have to 720gph power heads. My water perameters have been really good ( i test everyday) and I just tested now, and my nitrates are super high, nitrites are next to 0, no amonia, no phosphate. What would cause my nitrates to go so high in one day, but not nitrites? needless to say im about to do a water change. Any advice would be appreciated.
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