did that female by chance have a beard (gills that puffed out just like the male)? sometimes Plakat males get mislabled as females.
And yes, no male + female combo. they will fight as well.
edit: melafix is not so much a "medication", so you aren't going to do any harm if you dose correctly. I would think that you need a much smaller tank to treat a betta tho. A lot of medication has to go into 80 gallons. As with the large community tank, there is probably too much current in there. i was thinking that was a temporary quarantine.
And yes, no male + female combo. they will fight as well.
edit: melafix is not so much a "medication", so you aren't going to do any harm if you dose correctly. I would think that you need a much smaller tank to treat a betta tho. A lot of medication has to go into 80 gallons. As with the large community tank, there is probably too much current in there. i was thinking that was a temporary quarantine.