Yellow clown ich

[evil Nick]

So my little yellow clown hasn't been looking good and 2 nights ago I saw what looked like ich on it. I didn't have a qt setup so I took a large zip lock and qt't him in that floating in the tank and medicated him with my prazi pro and paraguard. Ive been dumping and re adding water in between and after 2 days he already looks 99% better. His color is back and the spots look fully gone. I was going to grab a 5 gallon tank from my buddy to setup as a qt but I was wondering if after another day or two he still looks good you guys think it would be safe to re introduce him to the tank.
I'm new to marine ich so I'm looking for some advice. In know freshwater the life span is 21 days but I'm also know prazi and paraguard kill the free floating parasite almost instantly.

Any tips? Thanks

My yellow tang and clowns all seem fine

[Delapool]

Is your fish improving?

[melosu58]

The span is 6 to 8 week in the SW world. If you have him in a bag you are going to have to treat the water.