Don I used to have forty aquariums where a small part of my workshop is now with two hundred African Violets in a divided room next to them on hydroponics. I think I am an enthusiast still in my mind with fish I believe with your wifes obvious support a wall display would be very satisfying indeed. I am glad my Orchid fetish has been put to rest with minus four C already this morning, my dearly beloved used to accuse me of keeping my fish, plants in a better environment than family. Our Hydronic heating thermostat (they must be made of platinum) died this week just as I went to turn the heating on.
Peter.