Phosphate constantly rising. Quick recap.... Tank age 5 months 60 Gal Cube 18 Gallon Sump Around 65 Gallons total water volume BRS 7 Stage RODI Red Sea Pro Salt Stock 4 small clowns cleaner shrimp royal gramma flame angel tomini tang diamond goby (sand sifter) 2 red legged hermits 15 trochus snails 2 narcissus snails Sump two skimz 300 micron sock swap out every 3 days Bubble Magus Curve 5, pulling about a full cup of skimmate a day (wet skimmate) Created 7 inch by 7inch fuge in the sump using egg crate; and Kessil H80 light I feed twice a day 8am and 6PM. I feed PE Mysis frozen shrimp as main food. Maybe a cube and a half total for the day. I do rotate in pellet food here and there. When feeding I scoop some tank water to defrost shrimp, and feed just shrimp not pouring any of the "melted liquid" into tank. But do not rinse shrimp. I can lower phos via dosing (phosphate Rx, and felt socks) but have been battling for over a month. I just started a fuge around 2 weeks ago to try to slow the increase.. The tank is populated with some corals, around 10 or so, all seem to be doing fine. Nothing dying off or retracting, but feel like slow overall growth of coral and little to no coralline. Water prams are: Temp 78.4-78.9 Salinity 35ppt Ph 8.10 Alk 10.2 Cal 420 Amm 0 Nitrite 0 Nitrate 10-20 I dosed last night, and at 7am this am it was .04 I went home for lunch, 5hrs later it was .06 I did test RODI off the unit, along with.. week old stored RODI water. Both came back at 0.0 I am testing using a Hanna checker HI713 Any suggestions would be great, I'm stumped. Thanks ahead of time!