Pond Boss Forums MANAGING AN EXISTING POND Evaluating and adjusting fish populations Pond full of dead fish

To those interested, I questioned the oxygen addition value that Sue provided above(5 lbs/day). Here is why. Those good at science please check my math. I am a biologist, not a math man AND you will soon see why.

There are 453 grams per pound. 453 x 5 lbs O2 per day is 2265 grams O2 per 24hr. 2265/24 hr = 94 grams of oxygen added /hr Or 94 million milligrams (an error here). Assume Donnie's pond has 1 million gallons. 1 mil x 3.87 liters = 3.87 mill liters of water in his pond. Donnie's CoActive airstation diffuser we are told should be adding 24 milligrams of oxygen per hour to his 3.87 million liters of water or 24.28 mg/L per hour. If we assume even a wild worst case DO loss of 5 mg/L(ppm) per hour that still leaves 19mg/L oxygen surplus. With anywhere near that much oxygen added per hour his fish should not be dead due to DO loss, they should be dead due to too much DO. What am I missing here? SEE Bergermeister's post below to show what I am missing - Special thanks to him.