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pH And Factors Affecting itThere are numerous factors which influence pH. - Minerals and carbonates tend to be scavengers of Hydrogen ions, which drives pH upwards. - Unsealed driftwood and other organic molecules tend to bind out those minerals and carbonates. These organic materials simultaneously generate Hydrogen ions in their decay, contributing to a lower pH. - Plants will use carbon dioxide during their exposure to light, and this raises the pH. - At night, plants give off carbon dioxide, which lowers the pH. - Fish and bacteria all use oxygen and render carbon dioxide 24/7 which lowers the pH. These biological processes tend to have the net effect on a fish tank of causing a downward movement of pH into the acidic range. The only force that slows or prevents this decline is the presence of a buffering agent; the carbonate molecule. Sadly, the carbonate molecule occurs in varying amounts in the environment and is an exhaustible resource. When the carbonates are exhausted, the effect is a sudden drop in pH, which can, and does, kill fish. “pH crash” is the overnight solution to having any fish to see. It’s a common method many people accidentally employ to create just a plant tank. ‘To make room for all new fish. To reduce feed costs to zero. ‘To eliminate crowding, completely. |
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