I am beginning to wonder as well. perhaps food with undigestible
grain might be a problem. but if the fish are looking for food and
they get fish appropriate foods, like itty bitty critters in small
amounts I dont see the problem.

0.05% is better to shoot for, but salt wont disappear unless the water
with the salt is removed. OTOH, evaporation during winter will
increase salinity unless ponds are topped up. Ingrid

On Tue, 1 May 2007 07:53:07 CST, Hal wrote:
Some think I'm a cruel pond
keeper and rant about food rotting in the fish gut, but it never
happened to me and many of my local friends who feed all winter.

I do add .1% salt during the coldest part
of winter, just before it warms up and allow it to disappear over the
summer. Theory behind the .1% salt is to stimulate the slime coat on
the fish and help them shed parasites that wake up before the fish's
immune system as the temperature climbs.