How To Calculate Pool Volume To Determine The Correct Dosage Of Chemicals To Be Added

by Pool Builders on 07-18-2011 in Articles

It is important to have proper chemical levels in your swimming pool as pool chemicals kill germs and bacteria that enter your pool. Improper levels may lead to mildew growth and possibly contribute to the spread of infection. If chemical levels are too high, swimmers may experience burning of the skin and eyes. Before you can determine the correct dosage of any chemical you're going to add, it's important to know how much water your pool holds. To determine the proper dose of chemicals for your pool you need to know the width, length, and average depth of your pool, and a multiplier that determines gallons.

If measured in feet:

Rectangular swimming pools - Length x Width x Average Depth x 6.25 = Pool volume in gallons

Circles/Kidney shaped swimming pools - Length x Width x Average Depth x 4.54 = Pool volume in litres

For all shapes measured in feet - Gallons x 4.54 = Volume in litres

If measured in Metres:

Rectangular swimming pools - Length x Width x Average Depth x 1000 = Pool volume in litres

Circles/Kidney shaped swimming pools - Length x Width x Average Depth x 1000 x 0.79 = Pool volume in litres

For all shapes measured in feet - Gallons x 4.54 = Volume in litres
If measured in meters - 1 cubic meter = 1000 litres

Above Ground Swimming Pools
Fast Set / Steel Frame

10' x 30" = 1000 gallons
12' x 32" = 1185 / 1520 gallons
15' x 36" = 2240 / 2780 gallons
18' x 42" = 4200 / 6076 gallons

One of the most common signs of incorrect chemical levels is cloudy water. Cloudy water is usually a sign of improper TA and filtration. Always check the PH and TA levels BEFORE you adjust your filtration system.

Follow these steps to investigate your filtration system:

1. Make sure that the filtration system is running at least 8 - 12 continuous hours daily.
2. Determine whether or not the filter needs to be backwashed. If the filter pressure does not return to normal starting pressure after backwashing, the filter needs to be chemically cleaned.
3. Have the pump strainer baskets and the skimmer baskets been emptied?
4. Also test your water to make sure that the pH and total alkalinity are within the ideal range.
5. Shock the pool with POOLIFE TurboShock or POOLIFE Rapid Shock. Remember to wait until the chlorine level drops to between 1 and 4 ppm before re-entering the pool.

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