The big problem is from the time a galvanized tank is made and shipped
and its finally purchased, it is slid around so much a lot of the zinc
(galvanize) gets scratched enough its now raw steel that is
unprotected. To much of a gamble to bury for a pond IMHO.

Even backfilling it could damage the galvanize, as its not as thick as
you would think it is. Rustoleum makes a epoxy paint with an additive
to make it acceptable for emersion in water....that is supposedly some
good stuff. A fish farm just got done coating a few insides of tanks
with it for their use and stated it works fine.


On Thu, 16 Jun 2005 15:36:24 -0400, "RichToyBox"
wrote:

===The zinc that is used in the galvanization process is fairly insoluble at
===the normal pH of water, and therefore should last a long time. If the zinc
===is dissolved, it can be harmful to the fish when the levels get high. If
===the bottom is not kept clean, layers of rotting leaves will become acidic,
===the galvanization will be removed and the metal will corrode. Painting will
===help to protect the galvanization. Many of the farm supply places that
===supply the galvanized tanks have similar polyethylene tanks, and they will
===not corrode. The polyethylene tanks will embrittle in sunlight (UV), so it
===is a good idea to provide the stack wall you discuss, and water absorbs some
===of the UV. They do make paints for plastics now so that you can make it any
===color you want. At least until the green algae covers it.


==============================================
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