I'm not sure, ask on the You tube comments section.
Seems like the top must be sealed, but with the air stone, not sure how that's done. Check valve might do it.

I've seen large Tube Hamster trail fish tanks, tube was a bit more $$$, but easier to work with.

I do not like them.
Tacky and obtrusive. But that's me.......some folks love tacky
Some think my taste might be tacky




Regards,
Tom Barr