If your measurements were incorrect, then you acutally only had approx 8.5 acrefeet that you put 1400 pounds of Alum into. If the pounds required for a 0.5 ratio @ 4 acrefeet is 302 pounds, then 8 acrefeet would use 604 pounds. Since your pond is actually 8.5 acrefeet, lets call it 700 pounds needed at a 0.5 rate bucket test. You used around 1400 pounds, which would equate to approx a 1.0 ratio bucket test.
I'm doing tests myself and I seem to get little if any change at a 0.5 ratio 1 gallon test, but a 1.0 ratio seems to clear it VERY fast. Of course there is a cooresponding PH crash I will have to balance out.
Interesting thing is the more Alum added the faster it would clear and re-clear if shook up. Is there anything wrong with adding a higher Alum ratio (1.0+) if the potential of a PH crash is balanced out with lime?
When I state "clear" it means I placed it against the same container type which held bottled water and it looked just as good.
