Hellobee Boards

My parents just use this lock on the fence door- https://www.amazon.com/gp/aw/d/B00J5TDVEE/ref=mp_s_a_1_1?ie=UTF8&qid=1469408115&sr=8-1&pi=SY200_QL40&keywords=pool+gate+lock&dpPl=1&dpID=41Sk45VaI8L&ref=plSrch

It does the job and I can't imagine a child being able to get into the pool with it.

You could use something like this on the back door-
https://www.amazon.com/gp/aw/d/B00178HMCI/ref=mp_s_a_1_1?ie=UTF8&qid=1469408285&sr=8-1&pi=SY200_QL40&keywords=door+alarm&dpPl=1&dpID=41TKiINpXOL&ref=plSrch

My advice is get them in swim lessons if they aren't already.

@winniebee: I love the idea of a pool alarm. I am also very paranoid about this as it seems to happen every summer that some kids even those who know how to swim, manage to get into a pool unsupervised with horrible consequences. Our complex has a pool but we are moving soon and will be house hunting very soon and I've been adamant about avoiding a pool just because of how paranoid I am. An alarm would really ease my fears

@winniebee: we had a fence installed with a gate latch but it didn't have an alarm. We recently switched it out to one that does have one, the MagnaLatch Alert. It was very easy to switch them out, though, since our original latch was also a MagnaLatch, just not one with an alarm. My point being that installing this type of latch alarm might not be so easy overall???!