Small pools (10 to 25 square meters) and medium pools (26 to 50 square meters) normally require one flotation system (easy release system) only! However, pools in excess of 12 meters in length will require two flotation systems for maximum safety. Our standard of product and workmanship is endorsed with a 3 year guarantee. Installation time on small pools is 1 1/2 hours, medium pools 2 hours and large pools 2 1/2 to 3 hours.