Sorry to hear
. In reading up on ich treatment I decided on doing hypo and there was an article that discussed many benefits to saltwater fish in hypo and they talked about it reducing the stress on the fish for water exchange or something like that which reserves energy, makes them more likely to start eating, etc...ill see if I can find it because I know I'm not stating all the facts correctly. It sounds like a good way to QT a new fish that may not be a great eater or something to try when you see signs of stress in a fish. One important note is they must be put into hypo slowly and brought out of hypo even slower.
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