While we are doing the 100% zero chlorine swimming pool water treatment at the hotel. We noticed nonstop ground water at the basement. We informed the client to install our anti-flood system with sensors instead of relying with a submersible pump gladly the client agreed with our recommendation. After a month, Typhoon Urduja landed in Boracay, most hotels beside them are submerged with flood water while their lower ground with a depth of 10 feet is still dry regardless the water outside of the hotel is waist deep.