I have a two montis I'm having issues with, they have browned out over the couple of months I've had them, the spongode has started to bleach a Lil. I have them in the middle of my 95 gal at mid depth maybe 18" below my light source. I have 4 T5s and 2 T8s for lighting. I have 4 maxi jet 400 powerheads for flow, my nitrates are 0, ammonia 0, ph 8.3, dkh 11, calcium 400, phosphates had become a problem in the past but I just added a phosban reactor and now my phosphates stay at 0 instead of . 25. I do keep the media at a non tubling flow rate. Salinity was at 30ppt and when they started to brown out I had my salinity at 35. I've moved these guys all over the tank and I have yet to see improvement. Can anyone help me w this I'm goin nuts over it!