Always re calculate the volume of water in any pool to be treated. Most pool owners will have a distorted view of the volume of water in the pool.
This calculation is the basis for every dose of chemical that will be introduced to the pool and is therefore vital.
To calculate the volume of water:
Length x Breadth x Average Depth = volume of water
Average depth is calculated by (depth in the shallow end + depth in the deep end) divided by 2.
Length 18 mtrs x 8 mtrs Breadth depth in the shallow end 1 mtr + depth in the deep end 2 mtrs, therefore average depth = (1mtr + 2 mtrs) divide by 2 = 1.5 mtrs.
Therefore volume = 18 x 8 x 1.5 = 216 cubic meters = 216,000 litres