As for the water movement, when the Siamese people started collecting wild Betta splendens over 300 years ago for fighting purposes, these fish were found and collected in slow moving rice patties and stagnant pools of shallow water. Some fish were even found in the foot prints left by the oxen used to plow the rice patty. The domestication of this fish to what we see now as Bettas (Siamese Fighting Fish) did not increase their need for moving water. Once again, its why these fish can be kept successfully in an unaerated bowl of water as long as the chemical conditions of that water do not decay to an unhealthy state whereby bacterial and fungal disease will overtake the fish. I have also seen Betta breeding farms in Thailand and noticed that none of them used running, moving water on their fish holding tanks. If these tanks were filled with non labrynth species, they would not have been able to survive due to lack of oxygen. Makes you wonder
Now from personal experience, I have been a Betta breeder for over 40 years and think I have a pretty good handle on what these fish need to survive and thrive.
I have documentation besides experience to confirm what I advise to people on this site CAN be done. While it is sometimes controversial and I have been engaged in conversation with many on this site as to what current beliefs are, ( right and wrong) my information is never a guess and is backed by experience over a 45+ year career of dealing with tropical fresh and saltwater fishes. You can see my experiences in my bio.
I hope I have enlightened you a bit and encourage you to get some more info prior to making any posts which may be later proven inaccurate.