So started off with 0/near 0 nitrates. Had only fish and a few coral. I have a clown,blue tang, 6 line, cardinal, lawn mower, mandarin, snowflake eel, serpent starfish, 5 nasasrius snails, a few turbo snails, emerald crabs, and hermit crabs. I have the same fish since I started. Wanted to start ventureing into more coral. Was recommended to increase feedings, changing the socks and cleaning the skimmer to once a week. Everything was steady climbing. I went on vacation for 2 weeks. My friend kept the same feeding schedule but didn’t clean the skimmer or socks. Been above the 70/80 since. At one point was above the highest reading amount. I changed 35 gals, plus doing the nopox. I got the nitrates down the the 70/80. I do 5 gallon water change a week, feed every other day between 3 different frozen foods and flakes. Had a refugium for about 4 months and then my light went out. Jus got new cheato 2 weeks ago. I have a 90 gallon with a 20 gallon sump.Also what is your fish load?