The pool must be filled with clean water and possibly from aqueduct (always follow and respect local regulations for provisions regarding the type of use of mains water). If aqueduct is not available, other sources can be used by respecting some rules:
1) Well water
If the water is taken from a well, it is necessary to do a test before introducing it into the pool: fill a container of about 10 liters with the well water and dissolve 10 grams of granular dichlorine in it. If after a few minutes you do not see any changes in color, you can use the well water to fill the pool without any worries. If, however, the water turns brown or whitish, use a metal sequestrant in a dose of 2 liters per 100 m3 of water before introducing chlorine-based products into the pool. The sequestrant aggregates the iron molecules and other minerals, causing them to precipitate to the bottom. The reaction due to the introduction of chlorine into mineral-rich waters actually causes a reaction that colors and clouds the pool water, making it unpleasant and uninviting. In these cases, it may take a few days to restore the water to perfect clarity. When this phenomenon occurs, it is necessary to suck up all the dirt from the bottom with the “Mud suction broom” keeping the 6-way valve of the sand filter in the discharge position.
2) Water from reservoirs
If the water is taken from an open basin, in addition to the operation described above, it is also necessary to filter it before introducing it into the pool and carry out an initial shock treatment with chlorine (15 grams for every m3 of water introduced into the pool).
3) Water from tankers
Even if the water is transported by a tanker, in addition to making sure it is clean, the reaction test to the introduction of chlorine must be carried out, intervening if necessary with a sequestrant as described above. In case of waters heavily loaded with iron or other minerals, it will be necessary to repeat the initial treatment with sequestrant periodically, during the season of use and when the water level is replenished (1 l every 100 m3 of water). It will also be essential at the beginning of each season to carry out the treatment with sequestrant (2 liters every 100 m3 of water) before reintroducing other chemical products into the pool.
