you can treat them, i did, but used a 1/4 of the dose, water change daily and another 1/4 dose. Lots of bubbles. they only had it on the fins so its cleared up. Good luck to everyone. Sorry to hear about the 8 dead, that sucks. I would take a pic if they arrived today and are dead already, and i'd also want 8 replaced. These aren't mollies, there fish you paid $20-25 apiece for. In your case $200 wasted, and someone elses profit. All respect to Jeff, they shouldn't continue to be shipped if there loaded with ich until there cleared of it.