~ jan JJsPond.us wrote in message . ..
On 14 Aug 2004 06:19:31 -0700, (Jerry G) wrote:

I've searched through this issue, but haven't found my exact problem
anywhere.

500 gallon pond with waterfall.
Crystal clear water (Maybe a slight brown tinge, but can see to 36"
bottom easily)
2000 gallon pressurized Cal Pond filter
1500 gallon Cal Pond pump
18V UV
Brown gunk growing all over waterfall and wall under waterfall

Because my waterfall is a little too powerful, I have to add appx 2
inches of carbon canned water daily due to the splash outside of the
pond.

What is the brown gunk? Dead Algae?

I'm fairly certain it is live algae, unless it was green to start with and
you PPed the pond.

What affect will it have on my pond?

Probably none, other than being ugly on the rocks, I'd take a brush to it.
~ jan


~Power to the Porg, Flow On!~

Live algae? I have a constantly running uv light.
Fish and turtles are doing great. Taking a brush to this stuff all
the time would be a pain in the butt. I may like the look of it when
it is all over the rocks....I was just curious to figure out what it
was.