Safety is always important with pools - no doubt. To keep our 6yr old safe we have a pool net installed. When we got it he couldn't swim at all - always wore a vest or something. Now that he is older he can swim but is by no means an expert (can swim to one side to the other with great doggy-paddle effort).
I ask because unlike having a fence... the net is always in the way. Instead of just going in and cleaning it one must take the net off to clean leaves or clear debris from the floor cleaner. So of course, the pool gets brushed and cleaned much less than it should be. Don't get me wrong, safety is first.
I was wondering how others have handled nets or fences with their kids as they've gotten older?