The scientific pursuit of underwater hamster objectivism
That is a fuzzy hamster. Is he pulling apart a glove?I cant recall, did you ever have fish or anything in the tanks? Sucker fish would be a great way to keep thrm clean with lesser effort, just not sure how the hamsters would react.
If you planned on ever increasing the size/scale of these things, I wonder about the possibility of DIY underwater habitats? Buckminster Fuller had some interesting design shapes that (similar to soccer balls) make large pseudo-spherical shapes that are incredibly resistant to deformation from pressure (such as might be encountered underwater) built from a number of identical plates that would be fairly simple to manufacture.