Why has the pool water turned green?
When you own a swimming pool, you always want clean and clear water, but who hasn't experienced green pool water?
Unfortunately, it's a phenomenon that happens even to the most careful owners. Let's look at the most common causes and how to solve the problem.
Why has the pool water turned green?
Danny, your pool expert, answers.
There can be several reasons why the water turns green:
- a malfunction of the filtration system or incorrect use
- ineffective or inconsistent chemical treatment
- imbalanced pH
The filtration system
The filtration system, especially during the hottest times of the year, should operate for at least 12 hours a day, during the hottest hours of the day.
It must be proportionate to the cubic meters of the pool, and during operation, it must be able to filter the entire pool water at least 2-3 times. In fact, on average, a filtration system should be able to filter the entire volume of pool water in 4-5 hours.
For the correct functioning of the filtration system, it is essential to keep it clean by backwashing the filter weekly.
It is also very important to check the skimmers and jets, as well as the pool plumbing, which must always be in good condition.
I tend to advise against the use of hydraulic cleaners because, unlike electric robotic cleaners, they dump the collected dirt from the pool into the sand filter.
An electric robotic cleaner, on the other hand, is a valuable aid, as it cleans the bottom and walls of the pool and filters the water autonomously, helping and not overloading the system.
Chemical treatment
Pool water can also turn green if poor-quality products are used. This is why I recommend always using certified products registered with the Ministry of Health, like those from ZavattiShop.
Water disinfection is very important; in fact, the green we see in the pool is actually algae that proliferate precisely due to poor or inadequate disinfection.
Another cause could be inconsistent chemical treatment, so try not to neglect your pool if you want it to always be at its best.
When we find green water in the pool, the only solution is a shock treatment with granular chlorine Diklor Shock Super.
Attention: it is important to also use the algaecide product Algastop, but only for prevention. When algae are already present, only chlorine can destroy them.
pH regulation
Another fundamental factor to prevent the formation of algae in the pool, which gives the water its greenish color, is to control and regulate the water's acidity.
The pH value in the pool must always be between 7.2 and 7.4; only then will the other products react well in the water.
In fact, we can add massive doses of Diklor Shock Super chlorine, but if the pH is imbalanced, it will not be able to work.
So, before performing a shock treatment on your pool water, always check the values with a classic test kit.
An important rule: when adding pH to the pool, it is good to set the system's selector valve to the recirculation function, to prevent the product from passing through the sand in the filtration system.
This small trick will help your filter and the sand inside last longer.
N.B. = If, despite all these precautions, your pool water is still green, it may be saturated with isocyanuric acid (a stabilizer contained in chlorine) and therefore unable to react to the addition of chlorine.
In this case, the only solution is to partially drain the pool and add new water, then proceed with the shock treatment.