I apply Stream to Sea's conditioner to my hair before the first dive, then a fresh water rinse, to protect my hair from salt water. Love being able to download my logs as soon as I'm done with the second dive using my Geo 4.0 computer (Oceanic) - though now I think I'll add the MacDive too! I love being able to have all the important info saved for my dives - weight, thermal protection, temp of water, what I saw. My dive buddy always says "it's not that important" but then will ask me "what was the temp for those dives?". Ha!