Soft Corals shrinkage

Wild1 · Feb 22, 2024

Within the last 2 or 3 months my corals have shrunk to at least half their original size. Nothing new has been added, and before that my tank was stable. It's my Hammers, Duncan, Zoa's and Candy Canes. Their colors mostly remained the same. It's a 90 gal. with a 30 gal. sump/refugium, with Current Orbit Pro LED lighting, which I've had on the tank with never any problem. My light sched. is RED 40%, GREEN 40% BLUE 85% and WHITE 10-15% for 9 hrs. I feed the 7 fish one time per day. I feed daily, pellets, Nori, and Mysis, on alternating days. My parameters are Salinity 1.025, Alkalinity 7 dhk, Calcium 400, Mag 1350, Phosphate .2-.5, Nitrate 0-1. The few SPS I have in the tank are unaffected. This tank has been up for a long time, but this is the first time i encountered this problem. Any help will be greatly appreciated. TIA

JayM · Feb 22, 2024

Hard to say without before and after pics, but a couple of things stand out as not being "in range". ALK is a little low, Phosphates are a little high, Nitrates could stand to be a touch higher and most people would say to feed 2-3 times a day.

Does "...before that my tank was stable" mean you're saying it isn't stable now?