This is a 5,000 gallon display.
I have considered adding bonnets in the future. They would get along just fine with BTRs. The female BTR will outgrow this set up and I'm ready to move her when the time comes.
The trick with bonnetheads is getting them to navigate well. They tend to swim high - and I designed the structure in this exhibit to leave the top open for bonnets and maybe cownose stingrays. I like to keep bonnets in a holding pool and slowly acclimate them to structures they need to swim around. It creates less stress for them and they do much better once into the main display. It also gives me time to ensure that they will target feed, so I don't have to worry about them getting food / vitamin supplements.