Taking in the lack of budget and the reticence of the the director to chance a venture on another fish tank, mine sounds like a better option. Optically, what you describe is nice, but this isn't a retirement home, or a rehab center. This is a low budget residential facility for the active treatment of developmental disabilites. This shelf is lower down, and about my only option, as safety and room does not allow for a large stand. As for the Kuhlii's. I have Residents who are specifically in love with snakes. Larger snake shaped fish tend to cause problems being agressive or eating anything smaller. I strongly considered a rope fish, but dismissed it for this reason. You are welcome to suggest a better option fulfilling my needed requirements.
I need a tank that is easily maintained and clean, which a tall full of messy or temperamental fish, unfortunately is not, and perhaps too conspicuous. I work with and teach my residents monday through Friday, so I am trying to take my inside knowledge to create the best options for them
Too colorful and large might also be a problem because I have residents with fixation issues. I want this to be enjoyable to the majority of residents, not a detrimental obsession for a few. My director absolutely does not want another large hi maintenance tank. But thank you for your suggestion. I would welcome any more good ideas you may have.
I need a tank that is easily maintained and clean, which a tall full of messy or temperamental fish, unfortunately is not, and perhaps too conspicuous. I work with and teach my residents monday through Friday, so I am trying to take my inside knowledge to create the best options for them

Too colorful and large might also be a problem because I have residents with fixation issues. I want this to be enjoyable to the majority of residents, not a detrimental obsession for a few. My director absolutely does not want another large hi maintenance tank. But thank you for your suggestion. I would welcome any more good ideas you may have.