"cindys" wrote in message
...
Hi! I'm relatively new to keeping an aquarium with fish, and here's my
question:

We have 2 black moor goldfish. One of them we had about a year in a
1-gallon
aquarium, and he did fine. A few weeks ago, we moved him to a 10-gallon
aquarium and added a second black moor. About a week ago, I noticed that
the
original black moor seemed to be having trouble swimming against the
current
of the filter. Upon closer inspection, I noticed that his tail seemed
frayed.

Is there an ammonia problem in this new setup? Have you checked for ammonia
and nitrites?

I phoned the pet shop, and he was diagnosed with fin and tail rot
and I am now on day 3 of 5 of treating the aquarium with tetracycline
tablets.

These will probably kill off your nitrifying bacteria. :-(

The sick fish seemed to be doing better as soon as I started
treatment but then I noticed he was in the corner by the heater, by the
surface of the water, not moving. I thought he was dead. But then, he
began
to swim around, frisky as ever.

Why are you heating the water for cold water fish? Goldfish don't need a
heater.

In the last 2 days, he seems to be spending an awful lot of time "resting"
in the corner by the heater, but then he periodically swims around and
looks
as healthy and happy as ever. His tail seems to be regenerating (or am I
imagining that ?) and his eyes seem clearer (or am I imagining that too?).
I
am inclined to believe if he were going to die, it would have happened by
now. He seems to be recuperating, so what is going on here?

Again, have you checked the ammonia and nitrite levels in this new set-up?
Are you doing weekly partial water changes? Did you quarantine the NEW fish
for at least 14 days before exposing him to your old fish?

Is he staying by
the heater for warmth? Is he tired? I thought maybe he was having trouble
fighting the current being generated by the filter,

How much current is this filter putting out? If it's annoying the fish you
need to slow it down or get another type or a smaller filter.

but even when I turn off
the filter, he stays in the corner. The other fish is swimming around
normally.

Any thoughts on what is going on here?
Best regards,

It doesn't sound too good. What was the PH in his old small tank and what
is the PH in this new tank? Could this be old tank syndrome?


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