Im not sure if they hide alot, my Histrix rays, or my blue rays never hid this much. its 200 gallon tank 72"X24X28". Water parameters are good and normal. i was just wondering do they not like current i have 2 big powerheads along with my fluval FX5. they come out and eat well they show no signs of stress they are about 7-8" in diameter. I may be worried for no reason they will come out and swim a few laps once and a while but back under the log? and always together oh and they are male/female.