by Rob Cox January 31, 2015
Adjusting swimming pool chemistry and achieving water balance has a few prerequisites.
You have to know what the current reading is, by testing and recording your readings for chlorine, pH, alkalinity, calcium hardness and cyanuric acid.
Then you have to decide if you need to make an adjustment to a more ideal range, and if so, you have to know how much chemical to add to achieve the desired increase or decrease.
Finally, you have to know how many gallons is in your pool, so that you can add the correct amount of pool chemical.
Today's post has all of the information you need to make precise chemical level adjustments to any swimming pool.
Ideally, a swimming pool should be within these range shown in the image.
Chlorine and bromine fluctuate the most, followed by pH and alkalinity - test these at least weekly. Calcium hardness levels, cyanuric acid levels and salt levels all change slowly, and can be tested monthly.
If you don't know how many gallons are in the pool, you could do the math, which is LxWxAvg Depthx7.5 for rectangular pools, or 5.9 for oval pools. Pentair has a nice pool volume calculator on their website, if you'd rather not do the math.