The usual idea would be low oxygen, but my filter is spilling out water and creating quite a lot of bubbles so I'm assuming this isn't the problem.
At first I thought maybe a pebble was swallowed but he can eat and I really can't see anything.
His mouth just keeps moving and moving.He will swim to the bottom but not for long. I have check all water aspects, however at current my tank is cycling, I changed the water about 5 hours ago, ammonia is fine, the ph did raise quite dramatically though since then. During the week the water went a bit bad, but I had no time for a water change. I have ammonia detox API brand. I also added a fake plant when I changed the tank, I washed it before hand, no soap just water. He seemed fine after the water change, temperature was exact when replacing water.
However, I do suspect Ich due to a white spot on his back. I don't know if this is a damaged fin though...
Help would be appreciated. I am going to the aquarium store first thing, however most of them don't seem to have a clue.
Mulder is a fantail goldfish - but also has the eyes of a celestial/telescope goldfish.
Water temp is 25 degrees.
26 litre tank to himself.