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Pools and water treatment
The volume is worked out, not guessed.
Pools, pumps, filters and treatment products, with the volume and the litres worked out from the dimensions and the doses multiplied only where their source is written.
Pools
Pools and liners
From the inflatable one in the yard to the in-ground pool.
Browse the tanks
Filtration
Pumps and filters
Chosen on flow rate, not on the box.
See the filtration
Treatment
Chemicals and testers
With the dose written on the label and worked out for your volume.
See the treatment
How much you put in your pool
A multiplication written in the open, not a recommendation.
| Pool volume |
|---|
| 8 m³Inflatable pool in the yard |
| 24 m³In-ground pool, 6 × 3 m |
| 48 m³Pool of 8 × 4 m |
The dose is the one on the product label. Read the label before every treatment and do not mix different products in the same dispenser.
How many times the water goes through the filter
The volume divided by the pump flow: that is how long one full turnover takes.
- Cleaning the filterWhen the pressure gauge climbs 0.3–0.5 bar above the start-up value, the filter needs cleaning.
- How long the pump stays onIn summer, in a pool used daily, the water has to go through the filter several times. In winter, far less.
- What clogs firstThe skimmer basket and the pump pre-filter. Check them before you blame the filter.
The figures are for a pump running non-stop. If you switch it off at night, divide the turnovers by the hours it actually runs.
Pools, pumps and treatment
Which filtration suits your pool
The same rows, on what clear water depends on.
| Filter type | Fineness | Cleaning | Filter medium | For which pool | |
|---|---|---|---|---|---|
| Cartridge | 10–20 microns | Rinsed with a hose | Paper cartridge | Inflatable pool, up to 15 m³ | |
| SandBest seller | 20–40 microns | Backwash | Quartz sand | In-ground pool, over 15 m³ | |
| Filter glass | 5–10 microns | Backwash | Crushed glass | Same filter, clearer water |
The figures come from the manufacturers’ sheets.
By part of the system
What values you want to see on the testers
The ranges below are the ones we write in the commissioning sheet.
- pH 7,0 – 7,4 6,08,5 Above the range: pH minus. Below it: pH plus. Correct it before the disinfectant.
- Free chlorinemg/l 0,5 – 1,5 05 Below the range the water is no longer disinfected. Above it, it smells and stings the eyes.
- Alkalinitymg/l 80 – 120 0240 It holds the pH in place. Too low, and the pH jumps from one day to the next.
- Cyanuric acidmg/l 20 – 50 0100 It protects the chlorine from the sun. Too much, and the chlorine stops working.
Measure before you treat. A pool with pH above the range burns through disinfectant for nothing.
How we work it out
Clear water is a division, not a miracle product
A pool keeps its water clean when the volume, the pump flow and the doses match each other. We write the multiplication in the open and put the source next to it.
Why we do not give doses on the spot
The dose depends on the real volume, on the water temperature and on how many people get in. We multiply the volume by the grams on the label and write the label next to the figure.
A pump is not a racing engine
A pump that is too big pushes the water through the filter faster than the filter can catch anything. The flow rate is chosen by volume, not by the power written on the box.
The pool, from spring to spring
The order matters: a poor wintering is paid for at the opening.
Opening, in spring
Take off the cover and clean
Wash the cover before you fold it away, otherwise you put it back dirty in autumn.
Start the filtration
Put the pump and the filter back, check the seals and let the water go through the filter a few times before you treat it.
Correct the water
The pH first, then the disinfectant. In that order, not the other way round.
Wintering, in autumn
Lower the water level
Below the skimmer mouth, so the ice has nothing to break.
Drain the system
The pump, the filter and the pipes are left without water. Water freezing inside cracks the pump body.
Add the wintering product
Treat the water before you cover the pool, so you do not find a green pool in April.
From the order to the first swim
The days are the ones written in the contract.
10working days, added up from the steps below
-
Visit and dimensions 1 working days
We measure the site and decide where the plant room goes.
-
Delivery of the equipment 5 working days
The pool, the pump, the filter and the fittings arrive in the same delivery.
-
Installation and filling 3 working days
We install the system, fill the pool and start the filtration.
-
Commissioning 1 working days
We adjust the water values and leave you the sheet with the ranges to watch.
The total adds itself up from the days written on each step.
Volume worked out from dimensions
Cubic metres and litres, written once.
Doses for your volume
From the grams on the label.
Turnover worked out
The volume divided by the pump flow.
Commissioning sheet
With the ranges to watch.
Questions before the season
What people ask us most often, on the phone.
Why is the water green even though I added chlorine?
Usually because the pH is outside the range and the chlorine no longer works. Measure the pH first, correct it, then treat.
Which pump do I need?
You start from the volume of the pool and from how many times you want the water to pass through the filter in a day. Send us the volume and we will tell you the flow rate.
Can I leave the water in the pool over winter?
Yes, with the level lowered below the skimmer, the system drained and the wintering product added. Emptying it completely lets the liner crack in the frost.
Are strip testers any good?
For a quick check, yes. For adjustments use a reagent tester: strips are read differently by different people.
Cannot find your question? Write to us, we answer the same working day.
Season opening and new prices
An email at the opening of the season and when new equipment arrives.