True Blue zoanthids are an old school zoa set the standard for blue hues in reef tanks. Also sometimes known as Tubbs Blue zoanthids, compared to other zoanthids in blue tones this one is relatively hardy and quick growing. The True Blue zoa prefers low to medium lighting in the range of 50 to 100 PAR and low to medium flow. They do have a tendency to change based on the lighting quality. Lower light makes them display larger polyp circumference whereas stronger and more intense light makes the circumference smaller but the coloration more vivid. While they are hardy zoas the True Blues will do best in an established system with stable water quality.