U prob wont be able to keep any silver dollats besides tigers and maybe thinbars.... i agree with other members on a 6 foot tank they dart too much.....and if ur going to attemot them in the tank i would remove that driftwood or ur asking for a bunch of sds all banged up
If you like the silver flash you could consider a couple dozen Columbian or diamond tetras. They would do real well with that nice aqua scale. Add a big group of Cory cats and a bristle nose and you have a sweet looking s.a. Tank