Hey, I got a 45 gal. bait tank and have had alot of trouble keeping my bait alive in it. I got enough oxygen in it so I dont think thats the problem. The bluegills seem to live alright but fish like suckers/ shiners keep dieing. I took 32 dead ones out of there today. Could I be over crowding it? Is there anything you can put in the water to keep them alive longer? Thanks!