"sue" wrote in message
...
Can anyone tell me why 4 large koi would die and 4 goldfish not?

Lack of oxygen? Filtration lacking? Not enough partial water changes?
Ammonia or nitrite buildup?

I have 8
fish in a holding tank for the winter and they all were fine and one day
my koi are dead ,no sign of disease or anything.

How many gallons is this holding tank and exactly how large were the koi?

The other smaller one are
fine.Were they getting too big?Needed more room?

Can you give a little more information?

--
RM....
Frugal ponding since 1995.
rec.ponder since late 1996.
My Pond & Aquarium Pages:
http://tinyurl.com/9do58
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