goldfish and ick

Peanut, I think your issue is that you are using too little salt.

It's excellent that you've raised the temperature and increased aeration, but by raising the temp you are speeding up the ich parasite life cycle. Without enough salt to kill off the parasites, you're just making the fish miserable! So it's important to increase the salt concentration. But rather than dumping it all in at once, you need to go slowly to prevent your fish going into shock.

The problem is that you said you've been changing the water and adding more salt over a "couple days". So we can't be sure exactly what concentration is in the tank water right now.

I recommend you use an old trick to change as much water as possible. Do a 75% water change, as you normally would, with dechlorinator. Then immediately do another 50% water change, with dechlorinator. Remember to match the temperature of the new water to the old! Doubling up like this will remove as much salt as we can to get a fresh start.

Now begin adding the salt back in. Start with one teaspoon of salt per gallon - so in your case, 29 teaspoons. That's equivalent to half a cup, plus 5 teaspoons.
After 12 hours, add another half cup plus 5 teaspoons.
After another 12 hours, add another half cup plus 5 teaspoons.

By this time the salt concentration will be at the right level. You should start to see an improvement within 48 hours. Keep the heat up at 80 degrees and keep the aeration going. Don't do a water change for 3 days after the final dose.

Best of luck, and keep us updated!

It does sound like a lot of salt, but think of it this way. It takes about 24 teaspoons per gallon to get to a 3% salt solution, which is full seawater strength. So you're not making the water as salty as it seems.
You will definitely need to remove the snail. Snails can handle minor amounts of salt in the water, but not enough for ich treatment.
This is the equivalent of what API recommends on their salt cartons, actually. Now that I'm checking the box, it says to add "1 rounded tablespoon per 5 gallons." Since three teaspoons are in 1 tablespoon, a "rounded" tablespoon would probably be about 5 teaspoons. So we're at about one teaspoon per gallon.
If you're worried about the level of salt, start at one teaspoon per gallon and check their reaction. If the fish are doing well, proceed with the second treatment. If you don't see any improvement, go with the third. Just be sure you have excellent aeration and the fish are still feeding.

Glad to hear there is progress! Keep us posted.

I have a bubble wand and all 3 of my fantails swim along it in the bubbles all the time. No health problems or scratching on anything else. I think they like the way it feels so I wouldn't worry about that you just might have one that likes it. Hope that you get your fish feeling better soon.