I have monitored the PH since I added the Alum and Lime and it has been steady at 7.5. I just got some more Alum and went ahead and did another jar test to see if anything has changed. The slurry test suggests the same amount of alum as I did the 1st time. I would have thought that the slurry test would have suggested that I didn't need as much Alum this time since there should be Alum in my pond all ready.I have all ready put 100 lbs of Alum 1 week ago and the slurry test still says to put in 60lb. per acre/ft. Do I lose the Alum that I put in the pond earlier or will the additional Alum mix with the all ready saturated Alum. I don't know if I should put lime with this next dose of Alum. I was told that 50 lbs. of Hydrated Lime was sufficient for up to 200 lbs of Alum. Is this true or should I put Lime to be safe.