Dividing a bow front aquarium

[EllRog]

Has anyone found the best method of dividing a bow front aquarium?
Whether it's worth making your own or if you can buy a made to size one.
I've not had to divide a tank before and wanted advice before I attempt it.
Ideally would like the water to be able to pass through the divider as I would preferably like to keep some guppies on one side and my male betta on the other (unless anyone knows of any reason why I shouldn't that is) and could do without multiple heaters and filters.
Tanks a 165L if anyone is interested lol
Thanks in advance all!

 

[JuiceBox52]

With the divider it would be fine, except that have different water requirements. Guppies need hard water and bettas need soft

 

[JuiceBox52]

@Byron

 

[EllRog]

With the divider it would be fine, except that have different water requirements. Guppies need hard water and bettas need soft

Ahhh of course! I had a niggling in the back of my mind and that was it! Maybe I'll have to jiggle around the tanks for the other half. Just too much effort to downsize tanks lol