Well if they think they have "enough" people I wonder what these "enough" people are doing since by what you said, it sure ain't cleaning tanks.

Look even if I was overwhelmed, I'd still bloody well tidy up the critters before I'd take a volunteer or anyone else through. That's just nasty to show off your animals while they sit there in their own waste products! However, since you were volunteering to do computer stuff and not direct animal care and by this person's response, well it sounds like they think their conditions are just nifty.

Like I said before, if your assessment is these animals are neglected or being cared for incorrectly....report these people. We don't need "educators" that can't educate themselves on proper husbandry for each species they keep.