Female betta fighter for training male betta fighter.
A small female betta fighter can only training 4-5 male fighters. No more time because female tired boring the male and swim away. So you should be have many female for switch training male betta fighter.
A big female only training in big tank 2 male. That's good quality.
Choose good healthy and aggressive big female betta fighter already condition 5-7 days put in big tank one night before training male next morning. Do this because want female cherish area in big tank and good training when put male in tank.
Aggressive female help training male fighter better quality. That's very important!