We have a semi in ground pool (built into the slope). We are all set for the liner to be delivered and fitted next week and intended to go and buy a pool alarm today, when.... I saw a posting somewhere which has confused me totally. To set the scene we have a gite which we rent out so are we limited as to which kind of pool alarm we can have? or are we able to have any of the 4 methods, i.e. fence, alarm, cover etc? I would be very grateful if someone could please confirm what sort of alarm we actually need. Gail