Jim,

I don't think it will work for tannins, though I am not sure. The following
site on the pucks gives a lot of information and discusses the clarifying of
the water/
http://www.koivet.com/html/articles/...?article_id=76
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html


"Phyllis and Jim Hurley" wrote in
message ...
Now that is a new one on me! Where did you get the idea of plaster of
Paris?


Do I read you right: 2 'egg' pucks per 500 gallons?

How long do they take to do their thing?

That would be a great blessing to lots of us who are resigned to tea
colored
water. The idea that a dozen 'pucks' would clear our pond is mind
boggling.
I assume that it could be done with a flat plate as well...remember making
those with a hand-print in kindergarten?

Jim

--
______________________________________________
See our pond at: home.bellsouth.net\p\pwp-jameshurley
Check out Jog-A-Thon fundraiser (clears $140+ per child) at: jogathon.net
______________________________________________
"Springworks" wrote in message
...
Plaster of Paris mixed, pour in a egg carton. 2 pucks per 500 gal of
water....
Magnesium and calcium ok for fish and it removes tannins from
water......
Doin this for 3 years, works great.......


"bc" wrote in message
...
I have two pairs of small ponds. One pair is near a pin oak and it
got
a
lot of leaves in it during the winter. I've removed all the leaves
and
the
water is clean and clear. The most of the goldfish survived the
winter.
But the water is brown. I think it's from the tannin in the oak
leaves.
Anybody know how to get rid of the brown color?

Thanks
Bill