New black moor sick, sitting at bottom. Is my goldfish tank too small?

Question

My black moor is sick I just got him from the fish store along with a goldfish to add with my other goldfish in a ten gallon tank I did a big water change because there was slot of nitrate and nitrite when I put him in the tank after that I noticed he would only stay to one corner of the tank now he is sitting at the bottom with his eye resting against an object please help me

Angel Alvarado, LVT · Accepted Answer

Check the water quality again use a liquid home test kit or submit a water sample for testing. The local Petco may do this for free or for a small fee Aim for an absence (0 ppm) of ammonia AND nitrites. Nitrates can be 20 ppm or less. Perform another partial water change, no more than 30% total volume, at a time. Use only conditioned water that is temperature matched to prevent stress or shock. Goldfish are cold water fish and do best between 65 F and 72 F. Additionally, a 10 gallon tank may be insufficient for 2 goldfish and a Black Moor. Goldfish produce a larger than average bio-load (waste) which can quickly overwhelm a small tank and after. Ideally, provide 20 gallons for one goldfish and an extra 10 gallons per fish. The filter should be rated for at least twice the volume of the tank. Even with a string filter, partial water changes and regular cleaning/vacuuming will be needed to maintain water quality.

New black moor sick, sitting at bottom. Is my goldfish tank too small?

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