I years ago start making my own homemade, from as far as I can from scrape, sunscreen; so my aunt told me about this. Here is my E-Mail back to her, which will do a more indepth coverage of this issue-
"At first couple websites I was feeling real good, http://oceanservice.noaa.gov/news/feb14/sunscreen.html &http://www.discoverhawaiitours.com/blog/what-is-coral-reef-safe-sunscreen#/what-is-coral-reef-safe-sunscreen , but then I read http://divermag.com/the-truth-about-sunscreens-and-coral-reefs/ . Then I went to www.EWG.com expecting to find only problem with sunscreens like Reef Safe & Raw Elements is they would not be good enough in sunscreen protection & I did, but Reef Safe is not safe to use, a lot of things that are toxic, as well that surprised me. Raw Elements sunscreen according to one of the first two-websites is supposed to be good for the reefs, third website says no, has the same extremely hard to replace & get effective enough & still just low toxicity rating sun protection ingredient that my homemade sunscreen has- Zinc Oxide. While you were talking about it, I was thinking of using titanium dioxide, also has low toxicity level & www.Care2.com health group member told me works as a great substitute for Zinc Oxide & good for darker skin (no white covering), but it it is just as bad for reefs. Thus, might as well stick with my homemade sunscreen, even though Raw Elements has a great rating for safety."
If you guys know more & have more chemicals that I can replace Zinc Oxide with, and still have lowest toxicity (www.EWG.com) & very high sun protection, then please by all means let me know of them.