Purple Tip Wall HammerModerately difficult to maintain, but with proper water conditions in the aquarium, it will thrive. It will require moderate lighting combined with moderate water movement within the aquarium. At night, its sweeper tentacles can extend up to six inches, making it a stinging hazard for nearby animals. Allow plenty of room between it and other neighboring corals. Maintain appropriate levels of alkalinity, calcium, and trace elements in the water. The