[header] How to care for silver dollar fish [title] Choose the right tank size. [step] One of the biggest factors in a fish's survival and wellbeing is the environment it lives in. Housing your silver dollar fish in a small, cramped tank can be very uncomfortable for your pet, and if you have more than one fish in the tank they may begin to compete for resources. 
[substeps] Some breeders recommend having a tank that holds at least 50 gallons of water to ensure adequate space. If you're considering housing a school of fish or breeding your own silver dollar fish you will need an even larger tank.