Shanghai Xiang Bath Equipment Co., Ltd. (www.shxsxy.com) located at 710 F, Building 3, No. 101 Wen Yi Road, Shanghai Minhang District, Shanghai, Contact: Manager Hu pouring concrete pools and gunite pools are similar, but construction much more difficult. Swimming pool in the construction of these, not sprayed concrete material assembled reinforced frame around the pool, but the concrete pour pouring into traditional wooden frame. With the increasingly widespread spraying methods, irrigation poured concrete pool almost quit out of the mainstream of the pool. In the stone pool Leiqi wall with concrete blocks. While these are not the same pool, but they have the same basic system of pipes and filters. In the following sections, we describe how these components work to maintain the pool. On the pH scale, zero indicates strong acid large swimming pool, 14 said alkali, 7 represents neutrality. Most experts recommend Swimming Pool pH was maintained between 7.2 and 7.8. To raise or lower pH heated pool equipment, swimming pool water, the administrator simply to put an acid or base. E.g., sodium carbonate (soda ash) or sodium bicarbonate (baking soda) may generally increase pH; adding hydrochloric acid or sodium bisulfite to reduce pH. Any new elements (swimmer body fat, chlorination, the items fall into the water) will change the overall chemical composition of the water, thus maintaining the proper chemical balance in the pool is an ongoing process. In addition to the pH, total alkalinity of the pool administrator should monitor, calcium hardness and total dissolved solids.