I think it does to. Arashi is at one end Koi is in the middle and Sakura is at the other end. Koi rarely flares at Arashi he is always to busy chasing Sakura along the divider. If you use the mesh dividers I would put two pieces in as it blocks the view even more. And make sure your female has places to hide so she doesn't become to stressed. I think it works cause she can get out of his view if she wants and same for him. I think the hiding places is very important.
Tiny and Squirtle (squirt)
RIP:To all my sweet bettas swimming under the rainbow bridge. Shall miss you all.