Rainman, Thank you sir! please explain a little more, are you saying 88 sks of alum for this 3 acre pond? I came up with 90 sks but a friend said 112 per acre foot. lost here in the translation
Hay! the cost might get to where I might just let mother nature takes it's course and reduce some pond management here. Kinda of sucks
90 sacks, (50 pound bags) would be 4500 pounds of Alum, and would work....I don't know what math your friend did, but that would be WAY too much alum per acre foot...I do a "standard" application at 200 lb per acre foot, a "heavy" treatment at 250 lb er acre foot, and "nuke" it at 300 lb per acre foot...I have only treated one pond that was loaded with colloidal Sodium Bentonite that required a heavier rate, 400 lb per acre foot to clear. The 200 pounds per acre foot should be great for you, and will bind all phosphorus present in the water column as well.
Remember, unless you KNOW your pH is high due to Calcium Carbonate, it may not buffer the alum well, so you should still use the Hydrated Lime at about 40-50% of the alum volume used...It is not so much the pH change that kills fish, but how FAST the pH changes ...
