A safer, longer lasting way to reduce
high pH is to add carbon dioxide, which
acts as an acid in water. Carbon dioxide
levels can be increased by adding organic
matter such as cracked corn, soybean
meal or cottonseed meal to ponds.
As organic matter decays, it releases
carbon dioxide. This method does not
reduce pH immediately, but it is a safe
and relatively dependable practice that
yields results rather quickly. Generally,
applying about 15 pounds per acre daily
for about 1 week should prevent pH
from rising to undesirable levels.