I think the first time I did an unofficial jar test it took my water approx a week to clear up sitting in the garage on a shelf. The first time I tested it with Alum it was clear in about 15mins. I haven't moved any further than that though. I was just about to pull the trigger on applications and for whatever reason the water cleared up and has been 12-24" visible on the secchi disk ever since (very strange).
Curious, how much water clarity are you looking to get out of the pond?
I’d be happy with 15-18”.
