Hello all!
First of all, I have a confession to make. I haven't been a very good goldfish owner up to this point. But, I'm trying to change my ways.
I am a teacher, and about 3 years ago a student teacher of mine showed up with 7 goldfish in a 1-gallon tank. By the time her term was over, 6 of them had died, and she didn't take the one remaining fish with her. Well, I wasn't going to kill the fish, so I took care of it. Well, I know (now) that they generally don't do well in such a small tank, but this fish seemed to thrive. I changed the water completely about once every 2-4 weeks, and fed it daily, but that was about it. It turned white but other than that seemed fine.
About a year ago, something happened to that tank, so I upgraded to a 2.5 gallon tank. The fish still did fine- this is one tough goldfish! Last week, I made the mistake of adding a second fish. A week later, one of my students noticed that the older fish was just sitting on the bottom and not really moving. I took a look at it and noticed white spots, at that point just on its tail. The other fish still looked fine, maybe a few white spots, but not nearly as many.
I couldn't get any fish medications that day (this was last Friday), because I work kinda out in the sticks, and nobody near there had even heard of fish medicine. So, I changed half of the water and took in some medicine the next day.
I got some aquarium salt and some "tank buddies" ick clear dissolving tablets (the stuff that turns the water purple), and yesterday I changed half the water, then added 1 teaspoon of salt and 1/4 tablet of the ick clear (one tablet does 10 gallons).
I do use water conditioner, I got some kind in a yellow bottle because it gives directions in "drops per gallon" which works well. I don't have containers to leave water sitting out for 24 hours (plus this has been an emergency so I've needed the new water NOW), but I go add the conditioner and try to match the temperature.
The fish looked about the same yesterday, except the new little one looked sicker. I also noticed that both now have tail rot, I don't think either did on Friday.
Well, last night I discovered this site and was reading about fish care. I realized that I had an old 10 gallon tank in my classroom closet that I usually use when we hatch butterflies. Today I went in and set it up. The old fish looks about the same, but I think the new fish died in the old tank while I was setting up the new one.
So now I guess I have one goldfish in a 10 gallon tank, like I'm supposed to have. I put the water bubbler from the small tank in, and am holding it down to the bottom with a carved rock from the old tank. I didn't move the gravel over from the old tank. There's not nearly enough, and I figure that it has ick in it. I filled the tank, then added the water conditioner, then put one of the ick cure tablets in, then the fish. I didn't add any water from the old tank but I tried to match temperatures.
I haven't put any salt in, because it sounds like the salt and the tablets might not interact well. I figured that I'd use the medication for a couple of days, then salt the water for a few weeks until the fish is completely better (if it gets completely better).
My question is- do you think it's too late for my surviving fish? It pretty much just hangs out at the bottom, and its tail is about half gone (the "bones" are longer though) and the tail also has red streaks. But, it does swim around when there's stuff happening, and it will go up and eat.
Also, in the new tank, what should I go from here on out to help it get better? Should I keep changing out 50% of the water every day? Should I stop using the tablets and start salting? If so, how much salt should I use?
Thanks for any suggestions.