If you want to learn more on scuba and snorkeling gear, then I suggest you take a look at our  gear guides for tips on:

Buying a Scuba Regulator/ How to maintain a  Regulator/ Buying a Scuba BCD/ How to maintain the Scuba BCD/ How to maintain Scuba Tanks/ Buying a Snorkeling Mask/ Mask Care and Maintenance tips/ Buying a Snorkel/ Snorkel Fins/ Tips on setting up your mask and snorkel