Bradley I am basicly on the same topic and have a question for Bassquatch , Thanks,

Bassquatch,
I have a 20-year old 3-acre pond, filled completly by a valley water shed. I never gave water quality a thought when I started the project. I had to install a overflow pipe almost immediatly because of rain. At the time I did not understand rain was acid rain. I stocked the pond with 100 bass and the same amount of bluegills. Around the third year the first 5-pound bass was caught, and many more for the next several years. However the last five years a 3-pound fish is hard to catch. During the hunting season a otter was seen in the water. So I thought (after reading) that was the problem. However I stumbled on this water issue and followed up on it. I had a expert water test done for my home and pond in 2010 before the Marcellus Shale gas drilling started in my area in Pennsylvania. I went back and looked at the pond water PH done at noon and was 5.8. I did recent test and they are all -4. Being it is all rain water it was hard to believe until I looked at EPA rain map for my area and it is -4. The ground in the fields is 6. However as we are experiencing snow melt, the water entering the pond is -4. My question is ? would I have a problem dumping too much lime at one time. I know lime itself will not go higher than 7. But from 4 to 6 ? There is a huge fish population in the pond. They almost look like clones, healthy and about 2-pound. But the bluegills seem to have suffered. Years back they were like fluke, but small now. Thanks in advance Average between 6-8 feet, deepest 34 feet.