Thanks for all the comments. There is 10 aro' s in there; 2 super red, 2 XB, 2 RTG, 1 Green, 2 Silvers, 1 Black, I am planning on removing my big silver 26" to a good home to free up some swimming space. The ray is a Tea Cup and is about 12" across and around 3 years old. It's hard to see in the pics but there is 7 x 4-5 " orange neck tie severums, 15 3-4 " Cllown loachs, and a glass cleaning army of 5 plecos. The tank is 110" L x 32" W x 40" D about 550 gallons., I have 120 gal sump tank with foam, bio balls, bio max and two mad drive 24's. I also have a fuval 404 full of ehiem bio media that works with a 36W UV 12X sterilzer recirculating in the sump. In the overflow compartment of the tank I have stackable trays with ceramic rings which some of the water trickles through slowly. To help with nitrates I have a Korallin s4002 Sulfur denitrator that is currently denitrating 45 gallons a day, with weekly water changes of 35 % the tank averages a nitrate level of 20-30 mg/L, and no ammonia or nitrite is detectable.
Thanks Again,