Should borates be the first chemical added to the pool? Carbonates are the traditional buffering system used in swimming pools. They perform the vital task of keeping the pH from fluctuating, thus ensuring the water in the pool remains comfortable for bathers and doesn't attack the vessel that contains it.
33,248 pages on this wiki. The United States tried to stop the spread of Communism by actively engaging in wars where the country in concern was in danger of being overwhelmed by a Communist Neighbor. For example, the United States defended South Korea against the Communist North Korea, and lost South Vietnam to the Communist North Vietnam.
By the end of 1989, the Cold War was over. The Berlin Wall, one of the great symbols of Soviet-American confrontation, had fallen. Communism was fast disappearing in Europe and in 1991 the Soviet Union itself ceased to exist. But in China, authoritarian rule by the Communist Party persisted. Dengâs economic reforms were enormously successful and the country soon emerged as an economic powerhouse. Businessmen in the United States, much like those in Japan and elsewhere, clamored for the opportunity to buy, sell, and invest in China.