I have a 90 gallon tank with a fire eel, black ghost knife, red tail black shark, opalne gourami, 3 serpae tetra, 3 white skirt tetra, 3 blood eye tetra, a clown pleco, and 5 giant danio. I'm looking to get 3-5 silver dollars, i know they get quite large and i am upgrading my tank within a year so thats not a problem. I dont know if they will get along with all the fish in my tank so i was wondering which ones would and would not. Thank you!!