Dennis,
I would go with Ingrid's advice. Last week I moved 6 minnows that were
in my 5 gal to my 20gal. I moved four 2" Comets from my 20gal to my 33gal,
and I moved my 9" comet from my 33gal to a new 90gal. Not a smart thing to
do all at once.

Nobody was happy they all behaved very erratically. I'm not sure if this is
true but a pet store
owner told me a fish can get use to high levels of nitrate over a period of
time, but if you go
from one tank to another and the difference is too high the fish goes into
shock and dies in a few days.
This is also true when PH levels are not matched.

In fact i lost a minnow and had to move them back to the 5gal.
The other fish mostly recovered but one of them is still freaked out and
goes nuts
hitting the sides of the tank every so often.

...Kodiak.

"Dennis Fox" wrote in message
...
Thanks for the advice.

Dennis

wrote:
move both sets of fish to buckets with airstones.
dismantle each tank putting the filter in big garbage bags to keep em
moist.
clean the tanks out, then pour in peroxide and scrub with that. rinse,
then set the
tanks up with the filters that were with the fish. so everything except
the tank
goes with the fish. that way you wont expose the fish to the other fish
diseases.
Ingrid

Dennis Fox wrote:


I am thinking of switching the fish in two aquariums. Have a goldfish
that needs more room and only a few tropicals (zebra danios and
pristella tetras) in a larger tank.

My question is ... would this be safe to do? Do I need to worry about
diseases being transmitted between them? Both tanks are cycled.

Any advice much appreciated,
Dennis




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