I don't get why you haven't already treated them? You said they were tipping over etc. We've gone over this and over this. You have detectable ammonia = that means you need to keep testing and change water when it gets over.25ppm. You should also test for nitrites. Their other symptoms seem consistent with gill flukes. The only way to be sure that's what they have is microscopic testing. We have to make an educated guess. You can either act, or keep watching them die. It's up to you. These are your fish who rely on you for everything. They can't do it by themselves.