2 days after adding meds:
On the first day most fish (especialy the females) were hiding behind the filter and looking unhappy - absolute panic, but the male's finrot looked better and they weren't dead 24h after the meds so i left them to it.
Now they've all come out and are acting completely normal. I didn't feed them this morning so i don't know if the male is eating again but he looks a lot happier and has gone back to chasing females.
My female's tail has lost the cloudy white edge where it's ragged, but one of her anal fin seems to be getting worse. She's still acting normal so i'm leaving them alone.
I think the hiding on the first day was because of a sudden change in the water's chemical composition. They did it when I added some bacterial meds a few months ago too, but seeing as even the loaches are still alive i think the meds are ok.