Would the royal Gramma disturb or kill any inverts in the aquarium?
NO! The Royal Gramma is not compatible with other fishes in an aquarium. I had this type of fish and it killed all other fishes. It will be better for you to go to a pet shop and to consult with an expert which fishes are compatible to live together. In my aquarium, I’ve put only the Guppy and fireworms. They live together very well and it’s very easy to feed them because they are not capricious with the food.
