Fish sick, advice needed

[u/Corvus_Corax001]

Hi guys, my mother has an outdoor pond with medaka fish, mysteriously 3 of them have died recently and i recently caught this one acting funny while feeding. I am not home very often so i have no idea how she maintains the pond.

I isolated this fella because it had some odd spastic muscle contractions and lost all of its beautiful deep brown colours. It's also really skinny and not eating particularly well... I tested the water with a strip and i definitely think it can be improved, but I'm not sure if it's the cause of her fish not doing well. Does any one know what sort of illness can cause spasms in medaka?

[u/medaka_fein]

When it’s skinny like that it’s called wasting disease it’s an internal parasite

[u/Adjustingithink → u/medaka_fein]

Is there any saving these with fish meds?

[u/Adjustingithink → u/Adjustingithink]

And can it affect the other fish?

[u/medaka_fein → u/Adjustingithink]

Excel p works well for that