Good call. An option for moving water is air (via aquarium air pumps,
etc.). No clogging issues.

"Lee Brouillet" wrote:

I had stuff similar to this last year, but a little worse: malevolent black
islands that floated to the surface during the day and sunk to the bottom at
night. Yours does not appear to be the same type, but the result will be the
same: your fish will die due to lack of oxygen.

No where in your pond did I see a water return to provide movement and
oxygen replacement in your water. I have pots in my back yard with plants in
them, but no filtration or movement, waiting for me to get around to
building a proper pond for them. They get the same kind of algae that you
have: it comes from lack of O2 and movement - in other words, it appears to
be stagnating. My suggestion at this time would be to get one of those
skimmer nets on poles that you buy in any pond supply area (Wal-Mart and
K-Mart have them) and skim as much of the stuff out as you can. It make take
days to get it all. In the meantime, install a pump that has a fountain
attachment on it that will provide water movement and aeration. They're
relatively cheap and can be purchased at a Home Depot or Lowe's type store
(they have the skimmer nets, too). Make sure the pump is plugged into a GFCI
outlet; because your pond area is just off your back porch, you probably
have one on your porch. While you're there, buy a couple of water plant
baskets, probably the square ones, to "clamshell" around your pump: with
that much algae, you'll probably clog the pump post-haste, and the baskets
may help to keep your pump from clogging. You'll have to clean the baskets
and the prefilters on the pump - probably daily - until the algae situation
improves, then it will be much less.

If I'm off-base regarding your lack of filtration, please let me know and
either I - or someone else around here - will try to give other suggestions.
Meanwhile, the warmer it gets, the worse it will get.

Lee


"John" wrote in message
m...
Experts:
Please take a look at the link below, and give me some advice. It is
really ugly now!
Thanks in advance.

http://www.jcsoftwareinc.com/pond/algea.JPG
http://www.jcsoftwareinc.com/pond/algea1.JPG
http://www.jcsoftwareinc.com/pond/algea2.JPG
http://www.jcsoftwareinc.com/pond/algea3.JPG