What can go under this?

[sharuq1]

I do agree it is completely overstocked with innappropriate fish and the seahorse is a terrible choice (honestly I wish I could take it home) unfortunately I am not in a position to be able to change her mind on her choices. She is a client of a family member and that person requested I not "burst her bubble", so I am trying to honour that request. I did suggest fake corals, actually and am hoping she buys some.