I'm looking for crystal clear water we can just walk out from shore and put our snorkles in the water. No garbage or seaweed/grass. Bonus if there are turtles and even better if it's not really expens...

Should I buy a year pass for our family to Sunway Lagoon if we are only going for a couple months? Is it amazing and we are going to want to go all the time? or is it just ok? Anyone have a coupon cod...