They are easy to keep. For best color and growth do high light and good flow so the polyps sway in the water. Just slowly place them higher till they are in final position. But they can grow very very fast so I usually keep them middle tank with good flow. Have them segregated on their own rock that doesn't touch any other rocks so you can control growth by breaking off the encrusting growth at the edges that grow off the rock. Because they will encrust everything and they do send out strong sweeper tentacles. If you do this you can have a really nice colored coral and control growth. When fully colored up they are really bright green with white stripes with hints of purple at the new growth.