Jungwoo
Aquarium Advice Newbie
I have a 1.75 inch common goldfish that started to exhibit some symptoms about 4 days ago. It's dorsal fin remains clamped down, it is developing a thin sunken belly, it is wobbling a bit when it swims and seems to have a translucent film over the back half of its body. The fish eats, but not like it used to. My tank is 12 gallons, acrylic with an Eclipse hood filter. Every week I do a 20%-25% H20 change, vaccum the gravel, change the filter cartridge and change a small Algone bag I keep in the filter. The tank has 3 other small fantails (under 1.5 inches long) that are very healty. My water quality is: PH 7.0, temp 82F, Amonia 0.25 ppm (toxic amonia 0.00165 ppm) and Nitrite 0.05 ppm. We also introduced two medium size, live, broad-leafed plants that seem to be doing fine along with a moss ball. I also added an air-stone 2 days ago thinking that oxygen level might be an issue. The tank has been running for around 5 months. I have studied several fish diseases on line and I suspect it is some type of bacterial infection or parasite brought on by stress, water-quality, etc. Any more specific diagnosis or treatment would be much appreciated. Thanks in advance.