Sick Platy Whoops Wrong Forum

[worried girl]

I have 2 platies, a male and a female. For 3 days the male has been unwell, not eating and hanging out by the top of the tank sometimes or right at the bottom. There are no other signs of disease and all my other fish look well. Ive done daily water changes (treated the water) to no avail. The female seems to be trying to encourage him to swim more but he just moves away. It's very sad. All water parameters are good. no nitites, nitrates 25. Unfortunatly I cant move him, no hospital tank
Any help appreciated. will repost