What do I need to buy ?

[Acipenser]

I am heading out to pick up some silver sides and wondering what else I need to buy ? My coral stock list is GBT anemone, frogspawn, colt, toad stool, finger leather. I am sure I should start putting things in my tank but I am unsure what I should buy - I don't want to be sold something I don't need.

These are in my 26 gallon along with a pair of clowns, Blue green chromis and a Bi colored blennie.