thank you for your reply vetteguy, so you think that more than likely I will lose all of my fish? I have about twenty of them now and it looks like they are all doing a lot better now. Unfortunately, I won’t be able to be able to take them out since they are extremely fast and there is a lot of Rockwell. This is my tank setup here. I purchased some ick polyp lab, but not sure how effective it will be at this stage.Also The display tank will have to be kept fishless (FALLOW) for 6-8 weeks to assure the existing parasites go through their life cycle without a host fish and die off. No need at all for 90 days