I like the look of those but 19 litres isn’t a lot of space for a Betta if the fluval edge won’t fit on the stand then I will definitely look into these though because one will fit onto the stand I think
19 litres is roughly 5 gallons, that’s fine for a betta as we tend to recommend 5 gallons to 10 gallons max for a single betta splenden.
There are a few options out there, a case of finding what tanks you like and seeing if it fits on that stand.
We are just giving a few ideas is all at the moment.