I noticed the betta tank seemed a bit shallow, I was right. It has great surface area but water depth should be six inches minimum and have at least and inch of room for air above the water. Is there a hole for the heater cord? Incase you didn't know bettas need water tempratures between 76 and 82°f. Oh, and when I said it seemed impractical I was mostly referring to accessibility.
We've tested them, and our Bettas are doing just fine. Thanks for the insight.