Yeah, just make sure you find the right ones before buying, problem is at fish shops there just advertised under silver dollars, well most shops i know...
Also keep an eye on any small fish you might have
I would ceratinly reccomend re-giging stock, not sure but rummynoses maybe a snack, even for the bala sharks, which i would reccomend rehoming, they grow very big indeed, i had four in my 5/2/2 and they needed a bigger tank in the end