Not sure about the pH, haven't tested that yet. There is a lot of sludge in
my mom's pond. It's twice as big as ours, with less fish, and ours is
clear.

wrote in message
.com...
I dont believe it is temperature dependent. what is your pH? Ingrid

On Sat, 5 May 2007 08:43:20 CST, "Henry & Carolyn"
wrote:

When do you start putting alum in the pond? Do you have to wait for the
water to warm up?
Carolyn