"D. J" wrote in message
...
Hi,

I have a 1000G indoor pond in my basement, I keep cichlids in it, it has
some rocks as decoration and a very thin layer of gravel, I feed fish
Hikari gold pellets, I have a layer of thick sticky oily deposit on all
sides of pond surface, this thing glues to rubber liner very well, I am
sure that it is not algea, it feels none organic and like very fine cream,
the color is very light red (similar to the color of the pellets), if
contacts with fingers, I have to use soap with get rid of it, so it
appears to be some kind of fat, it has no smell.

It is extremely difficult to clean, I have to drain my pond every other
month, and scrape it off with a scraper. Any idea of what is the cause of
the deposit and how to solve the problem?
=======================
It sounds like a combination of LOW-LIGHT algae and a bacterial coating. I
had something similar in a fish tank some years ago. It was solved by
increasing the amount of light and more partial water changes. You may also
need a bigger filter. You may have too many fish in your pond. What about
plant filtration? Do you have plants? You may be feeding them a little too
much for the amount of *partial* water changes you're doing.
--
McKoi.... the frugal ponder...
EVERYONE: "Please check people's headers for forgeries
before flushing." NAMES ARE BEING FORGED.
My Pond Page http://tinyurl.com/cuq5b
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