Originally Posted by FishinRod
Was the algae instantaneously gone after the big rain, or disappeared over time?

I guess a huge water flow through could flush out a large proportion of your floating algae.

OTOH, algae requires sunlight for photosynthesis. Muddy pond with no light penetration, then no algae growth!

It was gone immediately after the rain in in flow - I am just keeping an eye out for any future changes