If feeding could be partially or completely automated I think you're sitting on a goldmine (and I'll be waiting patiently for the IPO). If it absolutely needs to happen twice a day and has to be done by hand then there's no way I could have one of these on my desk at work (because lets face it, I'm not going to sign up for anything that has me driving to the office twice a day on the weekends and lugging a fish tank to and from work on a weekly basis is scary compulsive behavior) and I really REALLY want one of these things on my desk at work.

I could definitely see something like this going viral (sea monkeys 2.0) in short order if things progressed to a stage where they're relatively inexpensive, customizable (flourescent jellies ftw), and don't require a tedious amound of upkeep.