Before any other treatments, be sure of water quality. Even though the fish
have stopped eating, they will still produce ammonia, and with the warm days
they may be suffering from high ammonia. As they slow down more, the amount
of ammonia production drops significantly and the bacteria on the liner etc.
will keep it under control. As for treating with PP, one of the benefits of
PP is that it is not temperature sensitive, as is formalin.
--
RichToyBox
http://www.geocities.com/richtoybox/pondintro.html

"MC" wrote in message
om...
I saw my largest Koi jumping up out of the water 3 or 4 times in a row
from my window. I am in zone 5 and have already removed my filter and
stopped feeding (it was in the 20s a couple of night already). Now, we
are having an Indian Summer and it is in the 60s again. Water temp is
around 50. Should I treat with PP as I would normally do mid-season?
I am not sure about treating w/o filtration. I know for PP the filter
is removed during active period so maybe it doesn't matter.