Spinhirne ,

Are you saying that the first dose of Alum did not work because the PH didn't drop enough because of me adding to much Hydrated Lime at the same time of the initial dose. If this second dose of 100lbs. of Alum doesn't work, where do I go from here. My wife will kick me out of the house if I keep throwing 100 lbs. of Alum every week.
Should I increase my dose to 150 lbs. this time or stick with the 100 lbs. I am not going to add Lime this time and I will monitor the PH closely. I guess it would be better to let the Alum work first and then add Hydrated Lime if the PH drops too much than to put it all together like the first time. The PH in my latest jar test with the Alum slurry is 6.8. Should I have Lime handy at the time of Alum application and how low do I let the PH get before I add the lime. I thought that anything under 6.0 is detrimental to the fish in my pond. I am going to add this Alum at 9:00 A.M. July,21, so wish me luck. I will keep yall informed and thanks for everyones help. Please continue to give advice as I need all the help I can get.