I have a 4-5 yr old pond...stocked with Bgill'bass,catfish...... Fish have always been sassy heathy... Doing well.....36 hrs ago everything seemed fine. Yesterday we started seeing dead fish all 3 species. Pond about 2 acres. One very shallow end. Fighting algae used biologically on it about 8 days ago..... Borrowed an aerator from neighbor trying add oxygen.... Can't get any conservation help until Monday thanks for any help