I have a 180 gallon tank (currently making plans to build a 500 gal in the future) with some odballs. I have an Indo Pacific tarpon- Armatus Payara- Silver Arowana- Peacock Bass- and 2 Motoro Rays. They are all around 6-8". I was thinking about putting some Silver Dollars in there with them. I dont have any experience with Silver Dollars and I would like to know if they will get along with the fish I have. Thanks