I read the sticky, thanks much, and noted it said to ask questions first before treating with anything.
If treating ich with salt or meds, do the permanent Aqua Chargers (that the tank was started with) need to first be removed? There is no carbon.
Another post said to use 1 teaspoon salt per 5 gallons to be safe but I understand some of mine are sensitive to salt. All the fish except a few are under 1" - 1.5". Fish are tetras, a pleco, guppies, loaches (first ick sign was in a clown), swordtail, barbs and cats. The 80 gal tank temp has been increased to 84F with the lights off.
I believe they were overfed which raised the ammonia & nitrite to .50, from 0 on both. So we've done two 25% water changes in 2 days so far (plan to continue doing so). It lowered both to .25 after the first change, but today both are back to .50 before what will be the 3rd water change this evening, and after raising the tank temp. Nitrates are 5.0 today (were 10).
I'm not sure how to best approach ich treatment at this point. I don't even know for sure if salt is ok given these details, and also, is there anything besides salt treatment that will not stain?
The SO says lesson taken to heart (poor fish) about quarantine and stocking a tank.
Thanks much for any insight and help with the ick.