I noticed the OP used Ag Lime with the Alum....it should have been Hydrated Lime!!! The Aqua-marine color, as Bob Lusk pointed out to me is due to a very low pH from the Alum....Ag Lime works VERY slowly to raise/stabilize pH...Hydrated lime at a rate of 1/2 by weight to Alum will balance the pH once both are applied....I'd be surprised if there is not a near total fish kill from essentially using straight Alum to clear the pond....this is not a good thread for reference, IMO