I had pond built in Sept 2005, first stocking was on Mar 6th 35HBG 3-4', 50CC 6-8", 1000FH, 12LMB 4-6". Check pond daily and saw no problems saw minnows and few fish swimming ok. Mar 17th stocked 350 regular BG 3-4", 90RES 3-4", 1CC 9", 2000FH. Check pond every other day all seemed ok no dead fish all ok. Then went out this morning and found 18 dead BG, laying around the bank sure there are more that I cannot see. What could be my problem the pond is around 200x90 7-9' deep. I see minnows swimming in groups along the pond doing ok and seen a few bluegill swiming.