As far as saltwater fish go, Royal Grammas are a hardy and peaceful fish that are easy to care for, even for beginners to keeping saltwater tanks. They are reef safe, and they go well with most other peaceful fish in a saltwater community setup. They are not picky when it comes to housing them, but they require lots of places to hide. A single Royal Gramma can be kept in an aquarium that is at least 30 gallons, but they appreciate more room if you have the space for it. The key to the health and longevity of Royal Grammas lies with their diet and water quality. It is a good idea to establish regular water changes, and monitor their water parameters frequently. Owners of Royal Gramma recommend that you perform water checks and changes about 3 times a week to check on the parameters, and cleanliness.