May I chime in? I don't mean to sound preachy, but this topic is near and dear to me and when someone asks anything regarding pool safety and children, I will speak my peace. There is no judgement, only the safety of your children is of importance to me.
First--when we built our pool to code in 2004, the requirement was to have a barrier between child and pool. For neighbors, it meant a yard fence or a pool screen ("cage" as you call it). For the residents of the house with the pool, it is a fence between you and the pool. For ANY access to include doors and windows that are within a certain number of inches to ground level (somewhere between 36 and 48 inches, I am not sure the specs), code requires a 90 decibel alarm to be installed on the window or door.
These are sold at home depot and when armed--they sound as loud as a home security alarm. We also had our regular alarm system, so we had chimes on doors so we would know when doors open.
So I would recommend that.
The locks--sorry, while they help...they become a nuisance to constantly have to lock/unlock them. What can happen is complacency that you don't intend and that puts your child at risk.
A child pool fence OR a safety cover is your better bets. Folks don't like how they look--but it really doesn't matter. Years from now when your kids aren't at risk of falling in the pool, like when they are teens--pool fences come off and you can put covers onto the holes. Easy peasy. Totally recommend the pool fence. We had one and it allowed us to enjoy patio time and access to the yard without having to navigate an unguarded pool deck.
Lastly--if your children are 6 and under, consider--PLEASE--consider ISR swim lessons.
www.infantswim.org has info. All of my kids have had this. It will equip your child with the skills they need in the event they accidentally find themselves in water. Lessons that begin by teaching blowing bubbles are simply not adequate in the event of an accident. Many YMCA branches in Florida only offer Safe Start which is ISR taught via the Y. We no long live in a place where we get in the pool as often, but my baby is still enrolled and my son has had his refresher lessons already.
As of mid-April, there have been 37 drownings and 38 near drownings to date. The stories are all different and all very sad. (
http://www.foxnews.com/health/2011/04/22/report-75-drownings-near-drownings-15-weeks/#ixzz1KHeSOuLX)
Your pool may not have a fence because it isn't code to require one, it is just one of several options when building a pool.
We totally loved our pool--but please make sure you have as much between the pool and your children as possible for when the pool is not being used.
Noone is ever drown-proof and nothing replaces supervision.
The barriers, alarms, and survival lessons are the extra protections necessary in the event of an accident. (much like car seats in cars and fire drills in schools)
Happy moving! I wish I was in your shoes.