I have a 12X18 pond, 2 feet at the deepest. I added some plants last
year and a very messy algae soon began to develop. My water isn't green
and I am fairly dilligent about keeping organic matter out. I have a
waterfall , and the pond is lined with stone. I am in Southeastern PA
and this stuff did not seem to be affected by the cold. It looks like a
fuzzy mat about 2-3 inches thick that covers the entire bottom. It is
now even present in the stream that leads from my outlet tank. This
stuff makes the pond look like a water filled sink hole has developed
in my yard. In other words, the bottom is as green as grass.

I know that nutrients are usually the issue but this stuff was thriving
since last spring in clear water with more plants than I had in
previous years.

I have been using a pool skimmer to lift it (and skim it) from the
rocks but this action soon clogs my filter box to where the pump is
sucking air.

Finally my question:

I am thinking of skimming what I can and using a chemical treatment to
wipe it out. The question is, will the SAME type comeback if it is not
native to my area and will the chemicals break the algaes reproductive
cycle?

I have never used and chemicals in my four year history and hate to
start now. I have had the regular light fuzz on the rocks in the past.
That was fine and, from what I understand, is a good thing.


Thanks all!

Steve