Still, fish and inverts......two differant critters. Until you figure it out, I would still pull them for the time being. With them in another container you have only two variables......fish and water. As for now, there is no telling whats in your tank.
You want to know what to do to fix it, there it is, or, play russian roulette with the rest of the fish, its up to you.
Once they are in clean water, we can figure the rest out later.