Kritter Keepers are definately a valid option, if you're getting the correct size, Durbkat. Lots of people on this forum keep their bettas in Kritter Keepers. I
think that Kritter Keeper went through a recent name change to Herp Haven -- I'm not positive, I read it on one site, but this site was an online store, and who knows how accurate an estore is with their info, perhaps they actually meant to say, "we replaced Kritter Keeper with Herp Haven products."
I think a 'medium' Kritter Keeper actually runs about 2-3 US gallons, but I don't have the dementions memorized.
Is it a medium rectangle? A bit of searching about shows it to be 11.75" x 6.75" x 8", which is roughly 2.75 US gallons, if this is the same one.
If this is the same tank, your betta will love it, naturally, provided you give him the care his majesty requires.
