Scubaman--in the heat of the Caribbean, it can sometimes take only two days for a pool to show algae. I think the place looks lovely.
Not true. I have an inground pool and in August our temps reach 90 to 100 with all day baking sun hitting it. With proper maintenance with pool chemicals I have never had a problem like that. If you ignore it you'll for sure get a large growth of green algae on the sides. That growth shown in the picture has been growing for quite some time. It usually shows up in a very small area and easy to cure before it gets that large.