Yep it's an algae bloom. Nothing to worry about unless your clarity drops below 12 inches which I doubt it will since you're not fertilizing your pond.

The SMB fry are donig so well because it's feeding zooplankton. I've noticed the hot weather has intensified my existing algae blooms. If your bloom doesn't cut back when temps moderate it most definitely will this fall.

Most likely the phytoplankton (algae bloom) is taking up your nutrients and keeping any filamentous algae from getting started.

Last edited by Cecil Baird1; 07/27/10 10:13 PM.
If pigs could fly bacon would be harder to come by and there would be a lot of damaged trees.