The high numerical rating of this site leads one astray. Even the local Hilo dive shop, Nautilus, does not recommend it. Sure, the entrance is cool but you're going to bang up your equipment soon after that on the shallow rocks, except at high tide. Even then it's two football fields or more to get to diving depths and not much to see until the steep slope at about 50 feet deep. Save this for the beginning snorkelers. Let them have the cold freshwater lens with murky viz while you go out to dive Puhi or Leleiwi close by. Then come back with your wet gear to use the nice showers.