PLEASE EMERGENCY! Goldfish has large lump/boil/tumor pics My fish and I have been through a lot lately. From ich to fin rot to the eating of an unidentified floaty by the common goldfish. All of which are documented in past posts. Now the common goldfish has a HUGE lump on her side. At least the size of a small grape, right behind the pectoral fin on it's left side. It started roughly 5 days ago and has grown some everyday. At first I thought she was constipated and skipped a day of feeding. After seeing her poop and seeing the lump grow only on one side, I'm quite certain that's not it. Yesterday the scales started protruding. Today there is what looks like a boil or pimple coming to the surface, as I write this I went to get water to test and found it has opened and is draining what looks like white pimple goo, no worms apparent. I've done some research and have found that it's probably either a tumor or an internal parasite. The parasite theory has me worried about the floaty she ate. It was odd, looked almost like frogs eggs only with white specks instead of black. This was after the ich and fin rot, at the time I was worried she ate an ich bloom. Tank is 28 gallon 30x18x12. Running marineland emperor 280 w/biowheel. Contains one common goldfish, one black moor, one java fern pebble substrate and two air stones. (I am aware they need a larger tank and to be separated, getting a 45 gallon in a few weeks). Only stress coat currently in water. Usually I do 50 % pwc weekly, with gravel vac. Normally before pwc water levels with API master test kit are PH: 8.0 (is constant) Ammonia: .25 ppm NitrIte: 0 ppm (is constant) NitrAte: 40 Then after it's Ammonia: 0 ppm NitrAte: 5 ppm. This week (today) the levels were SUPER high! Ammonia: 1-1.5 ppm NitrAte: 80 ppm. Could this be because she is sick? Do I need to quarantine her or is it too late? All I have is a 5 gallon bucket with no filter and cats that will eat her. I have melafix here should I run it? If not what can I get? the goldfish seems nearly unperturbed by the growth. She swims normally, eats normally, poops normally. Occasionally she gets sideways but it's obvious it's because she is heavier on that side. Today, after the BAD numbers I did a 65% pwc and the new numbers are Ammonia: .25 ppm NitrAte: 5 ppm Also, they get fed for 2.5 minutes 2x daily. Flakes in the morning and alternately shelled peas or frozen bloodworms at night. Tank temp is 78 F (it's summer, there isn't much I can do...) Now I'm reading about fish TB? Thanks in advance for any help!