Okay - so I am feeding them Rotifers which is for fry and filter feeders approximately 2 to 3 times a week. I also see them fanning when they aren't being fed. The one I ahve left is not fanning even though I fed it today I think it is also getting ready to molt. The second one died today. Should I also try the iodine that was mentioned if this one survives? if that helps, then I would get them again. I like having them, but not if they are going to keep dying.