That's really awesome that he's taking an interested! Warning: I see a few more tanks in your futureWell Dan's doing his best, he spent over an hour at the store talking to people and researching. It seems harsh but I'd rather lose a few snails and have him interested in my hobby than save all the creatures and have him not give two shakes. If I could have everyone survive this that would be fantastic. But his intentions were good.....maybe thats kinda twisted on my part i dunno.
Like others have said, the cloudy eye could be a sign of poor water quality so I would check params when available, especially pH.
Any progress on the ich? I just had a break through with my platy fry. They no longer looked like sugar-coated and just have a few spots. I started dosing Seachem Paraguard a few days ago and it seems to have made a huge difference!