I used to have 1 goldfish in a 30 gallon tank with 1 HOB
Penguin Filter that pumped 200 GPH
. I upgraded to a 55 gallon and moved everything into the bigger tank for an instant cycle. I then added another HOB
Penguin filter and a sponge filter rated for up to 15 gallons. The 55 gal
still only has 1 goldfish so the bioload was never changed. The water temp fluctuates between 70f and 74f. The PH is between 7.5-8.5. Nitrates are between 0-20. And Nitrites are 0. I do not have an ammonia tester. I change about 20% of the water every 4-5 days.
My issue is that my goldfish is constantly going to the surface and pecking. I do not think it is because of a lack of Oxygen, as I have 3 filters the water is flowing well. In the old tank it had sand that she would peck at, and the surface occasionally, but now she’s in a bare bottom and since I moved her the pecking has increased. I was going to get another goldfish today to see if the issue is with the tank or with her individually. Why is she doing this?