I've just started a 10 gallon freshwater with two 3" Columbian Shark Catfish (they will soon be in a 75 gallon brackish). So far, they're lookin' good and acting fine. They love the current produced by the pump, and I'm feeding them small, HBH, sinking crumbles. As of now, I'm feeding them a couple times daily (just a pinch of the pellets). I don't want to over/under feed them. Does anyone have any experience with this species?