The correct pool chemical balance can sometimes be the furthest thing from your mind, especially in the colder weather when the pool isn’t being used. It’s easy to forget that the pool still requires correct chemical balances to remain clean and healthy all year round. Excessive chlorine levels and a high pH can cause unwanted degradation of pool covers, skimmer baskets, and pool cleaners which can make for an expensive start to the Summer!

Keeping your eye on these two main chemical levels each week will not only help your water stay clear, but will also prolong the life of your pool & equipment!

Here are some tips to help maintain a safe and correct balance. Using either a test strip or pool water test kit take a sample from approx. 30cms under the surface of the water.

1. Chlorine Levels

Ideal ranges – covered pool =.5 – 1ppm, uncovered pool 1 – 3ppm

If you use a pool cover, you will need to regularly check your chlorine levels to ensure it does not get too high. This is especially true if you have a salt water chlorinator as it is very easy to produce too much chlorine with a blanket fitted. Excessive Chlorine levels can result in the deterioration of your expensive pool blanket and pool cleaners. It can also have an effect on the pool surface and will affect bathers too!

High chlorine can also affect your pH, the higher the chlorine level, the higher the potential for an unhealthy pool. This can cause a raft of other issues, making it more expensive to correct when the weather warms up and you want to use the pool.

If your chlorine is too high, we suggest using a chlorine remover such as Chlorine Out. Alternatively, if the level is only a little high, you can remove the pool cover for a few days and retest until it has lowered.

There are a number of factors that affect a pool’s chlorine level. If you have a salt chlorinator the two main drivers are how long you run the pump and the chlorine output setting. We suggest calling us or coming in the shop for advice, or booking a service to get your pool set up right!

2. pH

Ideal ranges – 7.4 – 7.6

It is important to maintain the correct balance of your pH. If your pH is either too high or too low, it can affect the other chemical readings in the water.

A high pH makes your Chlorine ineffective and allows scaling to build up on the surface of your pool, the internals of your equipment, and other items such as salt cells. Very low pH can burn off the chlorine before it can sanitise the water and as the water is more acidic it will cause damage to the pool surface and your equipment.

Adding hydrochloric acid in the required quantity will reduce the pH of your water. The average amount required to drop the pH from 8.0 to 7.6 is 110mL per 10,000 litres of pool water. e.g a 50,000 litre pool will need approx. half a litre of hydrochloric acid to drop from 8.0 to 7.6*.

Always use protective equipment when handling pool chemicals, pour the acid into the bucket of water first, then disperse it around the pool with the pump running.

*This information is general in nature and should not be relied on for exact measurements