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Clean your pool before restarting.

From the spring, with the arrival of the beautiful days, it is necessary to think to put back its swimming pool in working order. If wintering has been done properly, it is not a complicated process. It is nevertheless necessary to respect some steps and instructions for a successful start-up.

When should you restart?

To restart the swimming pool after wintering, do not wait until the water temperature is too high. Indeed, the higher the temperature of the water, the greater the risk of proliferation of algae and bacteria. It is therefore recommended to carry out this operation as soon as the water reaches 12° C (15° C for pools treated with salt by electrolysis). Beyond 15° C, restarting will be much more complicated. The pool water generally reaches 12° C between March and April depending on the region (when the risk of significant freezing is ruled out).

Return to service after a total or passive rainy season

Passive wintering means that:
- the water level of the pool has been lowered below the skimmers;
- filtration was stopped ;
- the pipes were drained.
After this type of wintering, restarting is longer, but not complicated if you proceed methodically.

Store wintering equipment
To restart the pool after such a stop, you must first remove all equipment used to protect the pool during winter storage (gizzmos, backflow preventers, broom, floats and pool cover). If the rainwater pocket accumulated on the surface of the wintering cover is too large, a pump must be used to evacuate it.

Clean the bottom of the pool and its surroundings
By cleaning the edge of the pool and removing the significant dirt accumulated at the bottom of the pool at this stage, we make sure to minimize the contribution of dirt in the pool. The coping must be carefully cleaned (from inside to outside) and anti-foam or special products for pool floors can be used. The use of a high-pressure cleaner may be necessary. Be careful, however, not to damage the soft stone elements!

Wash and reinstall equipment, then re-water
The baskets of skimmers and sand filters must be cleaned. In the case of a diatomite filteryou have to recharge. For a cartridge filteryou have to replace the old cartridge with a new one.
Once these cleanings are done, it is necessary to put back in water (until ¾ about skimmers) and revive the filtration system. The days after restarting, the filter should be monitored carefully, the clogging risks being higher due to impurities accumulated during the winter. In aboveground pools, an algaecide will be sprayed on the walls and allowed to dry before re-watering.

Treat the water
Once the pool is returned to water, it must be treated (after analysis and adjustment of its pH and alkalinity). A shock treatment may be necessary to disinfect it (it will be necessary to adapt the pH andalkalinity to the chosen treatment). The most common treatments (ie the introduction of a high dose of disinfectant) are bromine or to chlorine. It is necessary to check the compatibility of the products used.
After the water treatment, you have to wait at least 48 hours before bathing and let the filtration system run continuously for a minimum of 24 hours (the water must be perfectly clear again). In the case of sand filters, it is possible to use a flocculant to treat turbid water: the flocculant increases the efficiency of the sand filter.

Clean the basin
Using a manual broom vacuum cleaner or a automatic robot, the basin must be thoroughly cleaned. The use of a brush will remove dirt from the walls. If they are too many or too big, you have to switch the system to sewer mode for a few hours.
Once the pool has been cleaned, the water treated and filtered for 48 hours, the accessories (ladders, diving board, etc.) must be replaced by first checking their condition.

Return to service after an active winter season

After an active winter season, restarting is significantly faster and easier than after a passive or total wintering. In fact, the filter has been idling all winter and the water has not, a priori, accumulated too much dirt. It must nevertheless check its quality and make some adjustments.

Clean the basin and its surroundings
As after a passive wintering, the bottom of the pond must be cleaned with a robot or a manual broom vacuum and the walls with a brush. Special attention should be paid to the water line, which often retains more dirt (a "special water line" pool product can be used).

Change the filters and test the water
The filters must also be cleaned and / or changed. The sand filter must be washed, rinsed, then replaced and the diatomite and cartridge filters must be replaced. The pH of the water is then measured by a tester and adjusted.

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