UPDATE!!!

I have always thought my pond was 3.5 acres because the NRCS had listed that as the size of my pond when they supervised the repairs I had done. IN FACT my pond is 1.48 acres when using an aerial map to measure the area. I felt it important to update this thread because the amount of alum required will need to be doubled to get good results when compared to the earlier posts!

After seeing a TRUE 3 acre pond_ I KNEW mine was not as big as the NRCS had told me. Guess this happens to spatially challenged people and I SWEAR--This is the only size I exaggerated!