 So, for example, you can't use a standard chain link fence because the squares between the wires are big enough for a child to get a toehold. Instead, you'll need a special type of chain link that has smaller openings. Now, the weakest link in all of your pool fencing is going to be the gate. Your gate must be self-closing and it must be self-latching. So they're going to slam shut if you happen to leave them open.