Mellie101 wrote:
Hello. Don't know what I've done wrong or how to change it. My
pearlscale started to sit on the bottom at certain times of day.
Mostly in the morning and at night. As soon as I put food in he is by
far the most aggresive feeder of the four. Yesterday he sat there
looking so sad and I was at a loss. I went to the pet store and bought
some anti-biotic food. They hate it but eat some. All the water
parameters are fine. No ammonia, no nitrites and the nitrates are
currently around 10ppm. The did get to about 40 at the weekend so I
did a water change to make sure the 'sitting on the bottom' wasn't a
result of this. PH is around 7.8. Today he is a bit more mobile but
now my black moor is doing the same. I just don't get it. They have
had no 'fresh, frozen' food given so can't think of any way that
something harmful has been introduced. I give them freeze dried,
flakes, peas, orange slices daphnia, blood worms, shrimp and tubifex
worms. I did think that it could be a result of the weather getting
warmer but I have my ac set at around 72 and the tank thermometer shows
that the water stays as warm as room temperature.

Any suggestions please? I am really at a loss.

This really sounds like nitrite toxicity... Are you 100% sure there are
no nitrites in the tank? Perhaps something else got into the tank.

Is there anything else unusual about the fish, no matter how small?

Focus on water quality and see if that helps. Change some water every
few days (25% is good) and add lots of fresh, high-quality carbon to the
filter. Clean the gravel really well as you do the extra water changes.
Also consider running with 1 tbsp salt/5 gallons of water for a while.

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