The importance of a proper pool fence that complies with SANS regulation is plane common sense.
The fence is to be a minimum of 1,2m high the bar spacing mut be smaller than 100mm.
The bars must be a minimum of 10mm thick and free of any design (foot hold) for at least 1m.high.
Gates must be self locking and child proof with a rigid frame and mounted on sturdy posts.
Whether you have a fence or a net or both never leave a child unsupervised near a pool.