In article ,
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Yes, as you suspected, the amonia began to increase (water clarity has
remained excellent now that I reduced feedings to several tiny amounts
durng the day). I've found now that every other day changing out 50%
of the water and replacing it with matched temperature, de-chlor etc'd
water has kept the levels good. BTW, this isn't really that hard given
the size of the tank. Not really a chore. T've been treating the water
with Melafix since I determined the water was initially so badly out
of whack. I hope this is helping, the black continues to spread (I
thought this was a sign of healing and considering the state of her
initial water she probably will be midnight black for a while).

I've found out that my son's preschool has a 10 gall acquarium with
heater, filters etc and that the day care lady is quite a fish
afficionado. I plan to ask her if Goldie can have a new home with her.
My one concern is that the tank currently has three small (1
inch)fancy tail guppies and maybe a Betta (not sure). Will the
goldfish eat these (or conversely, will they eat him?)

Marie

I'm not sure what the timing is between burn and blackening. It
could well be that it's still spreading because it's still getting
burned between PWCs. Since you agree that water quality is
of paramount importance, why not just do them daily for a while
as a just-in-case? As you say, it's not that big a chore, and
is good for the fish.

If the day-care lady is a real fish-ionado(*), she'll probably resist
just adding another fish to an existing setup. I know I would:
even a small goldfish would be close to doubling the biomass,
and more than doubling the ammonia production, I suspect.
In other words, more work for her that she may not want.
But I suspect she might be open to a deal: maybe you
volunteer to help out with time or fishfood or ?

Good luck.
Gunther

(*) - I hereby claim all rights and privileges with respect to
the word "fish-ionado" or derivations thereof for commercial
and/or artistic purposes.