Install fencing that’s at least five feet high and features self-locking, self-closing gates. Regularly check and repair the pool’s drain and suction covers to prevent accidental entrapment. Never let anyone swim alone, and make sure children are well supervised. Have a pool hook, plenty of life vests, a ring buoy with line, and a phone close by. Consider learning CPR, and use a pool cover when the fun’s done. Ban head-first dives.