I guess my much bigger question, and will broach with LSU, if the liming recommendation is based on soil that is not submerged in water, how much lime is it going to take and at what intervals, for a 10 million gallon watershed to get the pH to where it needs to be?
I'm confused. Was the soil sample sent to LSU taken from the pond bottom or shoreline?
Based on LSU's numbers given in your report, it will take about ton/acre to raise the pH approximately 0.50. Given your present pH at 5.31, it will take about 3 applications just to get it to 6.5 which is the bottom of the usual acceptable range. As was previously stated, it is also equally important to raise the Alkalinity to at least 20. Any purposeful altering of pH should be a very slow an gradual process. Abrupt changes in pH (even 0.50) could have a severe negative impact on the entire eco-system.
I find it interesting the LSU does not include any findings for Ammonia or Nitrite in their water test results.