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Many sunscreens are actually harmful to aquatic ecosystems. Especially in high concentrations of divers/bathers that use it, sunscreen can come off and accumulate on the water's surface like an oilslick. This is a big concern at the Great Barrier Reef for example. People are encouraged to use...

Hi I'm Fred. I'm experienced in diving wrecks & caves. I am an active conservationist, and I am very busy working to protect reefs and sealife so that they may bewilder the coming generations. I look forward to chit-chat and make friends, but I will also post some advice and info on how to help...