last week my weakest guppy prolapsed and was so skinny and weak I euthanised him. Today one of my most vigorous guppies has the same, it got progressively worse but he was acting normal. Until I fed the fish and he near enough exploded. I’m finding guppy keeping quite distressing at the moment. I’m planning to worm treat the tank, buy a higher quality food and not buy any fish for a good long while. Is there anything else that might prevent this happening again. My research leads me to believe that this condition is not contagious.