I'd like a slice too please, even a smallish one would do.
Whether the betta appreciates the bubbles will depend on the fish. Some betta absolutely love a lot of water movement, go surfing in the water column and bubbles. Other detest it, like a calm, serene tank. The bubbles won't hurt it though, and it will probably be a very pretty tank. I've got a 10 gal. right now with babies growing out and it has two sponge filters going but they are sort of hidden by a forest of watersprites and it looks real nice in there.