Kato, do you mind a little constructive criticism? I would have found your thread more interesting, as maybe others in the future will, if I knew what either an Ariel or a Betta was, and what they do. Never heard of either. Perhaps something about that in post #1? Your video in post #2 doesn't show up, just a blank, white area. And one of my personal pet peeves is video taken in portrait orientation (with the big black bars on each side). So, you know, like 90% of the video on the internet!! Shoot your video holding your phone in landscape (wide, not tall) and it will show more of what's going on, and more of your beautiful pool. I hope this is helpful, but either way I suspect this comparison will be valuable to many in coming weeks/months/years. Good job.