I would do as large as a water change as you can. Nitatres as stated above should not be above 20ppm.
What kind of filter, tank size and do you have a skimmer? Thats alot of nitrate! lol
180g Reef - 60g Rimless Reef -90G FOWLR- 125g Malawi Cichlids- 40b REEF- 34g Fresh Planted-working on- 20L FOWLR- working on
I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.