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For an adjustment of the alkalinity from 70 ppm to 100 ppm in a 250,000 gallon pool using sodium bicarbonate, the amount of added chemical is mathematically given as
X=105lbs
Generally, the equation for the Chemical added is mathematically given as
X=requred usage*desired change/10ppm*pool of gallon/10000
Therefore
X=1.4*(100-70/10)*(250000/10000
X=105lbs
In conclusion, the added chemical
X=105lbs
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