Aquanauts is 25 minutes drive or so from Soliman Bay. I have also done many dives with them in Puerto Aventuras and if you are close then they are the people to dive with, but really, the diving is not better in Puerto than Tulum or Akumal, just a bit different although I would say Akumal and Puerto are more similar to each other than to Soliman, Tankah and Tulum reefs. I seem to be the only one posting here who has actually dove down there. If you search these boards and others you can find plenty of people who have and have made comments, mostly positive about Tulum area diving.