Your bowls are fabulous.
I especially like the plant combo in the right bowl. Do you have a plant list for that one?
The right one has lugwigia repens, wisteria, duckweed, salavinia, and blyxa. Its going to need a redo soon.
The left bowl on the other hand is doing great.
When I redo the right bowl it will be the second time since I first set them up. I havent redone the left one at all. The only thing I can figure is the air duct vent blows right on the right bowl and the left bowl is protected from it by the bookshelf and the right bowl.