Several new goldfish with ich and red streaks

Hello all!

I bought some new comet goldfish and have them in quarantine. One has
ich so I put in a 3% salt solution and raised the temp to 80 degrees
while keeping it in the dark. - in lew of this what is the best med
for ich?

The others have red on them I'm guessing from poor water and stress
before I got them. There now getting a nutritious diet and I'm
keeping the water quality in top condition.

Suggestions?

Please write me if you can -