Domakihub Salt Water Pool Care Basics: Keep Your Pool Clean Year-Round
Simpler than traditional chlorine, but salt pools still need regular attention to stay safe and sparkling.
Reviewed by Domakihub pool pros · 2026-06-23 · 5 min read
Salt water pools are popular across Greece — in private villas, holiday rentals, and hotel courtyards — because they feel gentler on the skin and eyes than traditionally chlorinated water. The video above walks you through the essentials visually; this guide gives you the ordered steps and chemistry targets you can pin to your pump room wall. Get both the rhythm and the numbers right, and your pool will stay clear through the long Greek swimming season.
How a Salt Water Pool Actually Works
A salt chlorine generator (SCG) dissolves a measured amount of pool-grade salt into the water, then passes it through electrolytic cells that split sodium chloride into free chlorine. That chlorine sanitises the water and then reverts to salt — so the cycle repeats with minimal chemical top-ups. The salt level itself stays relatively stable; what you are really managing is the output of the cell and the surrounding water chemistry that lets it work efficiently.
In Greece's Mediterranean climate, intense UV radiation, high summer temperatures, and heavy bather loads in rental properties all accelerate chlorine burn-off and can throw pH out of range quickly. That makes weekly testing non-negotiable, even in a system designed to be low-maintenance.
What Makes Salt Pool Chemistry Different
Traditional pools use direct chlorine additions; salt pools produce chlorine on demand, so the dial on the SCG replaces the bag of shock most of the time. However, salt water is slightly corrosive to certain metals and grout if salinity drifts too high, and SCG cells simply stop working efficiently when pH climbs above 7.8. Calcium hardness and cyanuric acid (stabiliser) still matter because they protect the cell plates and shield free chlorine from UV destruction — critical in Greece's strong sunshine.
The recommended salt range is 2,700–3,400 ppm (check your SCG manual for its exact window). Free chlorine should sit at 1–3 ppm, pH at 7.4–7.6, alkalinity at 80–120 ppm, cyanuric acid at 50–80 ppm, and calcium hardness at 200–400 ppm. Keep these numbers on a laminated card near the equipment.
5 Steps to Routine Salt Water Pool Maintenance
- 1
Test the Water Twice a Week
Use a quality liquid test kit or digital photometer — not just strips — to check free chlorine, pH, and salt level at least twice weekly during the peak season (May–October in Greece). Test alkalinity and stabiliser every two weeks. Early detection of pH drift is the single most effective way to prevent cell scale and cloudy water.
- 2
Adjust pH and Alkalinity Before Anything Else
If pH is above 7.6, add muriatic acid slowly near a return jet with the pump running; if below 7.4, add sodium carbonate (soda ash). Always correct alkalinity first, as it acts as a pH buffer. Never add acid and alkaline chemicals at the same time — wait at least four hours between adjustments and retest before making further additions.
- 3
Check and Adjust the Salt Level Seasonally
Top up salt only when the SCG display or test kit shows you are below your cell's minimum (usually 2,700 ppm). Use food-grade or pool-grade sodium chloride — never iodised table salt or road salt. Add the required amount near the pool steps, brush it across the floor to dissolve, and run the pump for 24 hours before retesting. In Greek rentals, dilution from rain or backwash rarely drops salt dramatically; evaporation actually concentrates it slightly, so test before assuming you need to add more.
- 4
Inspect and Clean the Salt Cell Every 3 Months
Turn off the SCG, remove the cell, and hold it up to the light to check for white calcium scale on the plates. If scaling is visible, soak the cell for 15 minutes in a 4:1 water-to-muriatic acid solution in a bucket (wear goggles and gloves), then rinse thoroughly with a garden hose. Never use a metal scraper — it damages the titanium coating. Many modern cells have self-cleaning reverse-polarity cycles; even these benefit from a manual inspection at the start and end of the swimming season.
- 5
Shock the Pool Weekly in Peak Summer
Even with an SCG running, high bather loads, thunderstorms, or algae outbreaks in Greek summer call for an oxidiser boost. Use non-chlorine shock (potassium monopersulphate) for routine weekly oxidation without raising chlorine above the safe swim level. For a visible algae problem, temporarily boost the SCG to 100% output for 24–48 hours and brush walls and floor, then retest and return the dial to your normal setting. Never pour liquid acid and shock into the pool within the same hour.
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FAQ
- How much salt does a typical pool in Greece need to start up?
- A standard 50 m³ (50,000 litre) pool starting from fresh water needs roughly 135–170 kg of pool-grade salt to reach the 2,700–3,400 ppm target range. Weigh the volume of your pool precisely and use the formula: (target ppm ÷ 1,000,000) × litres × 1.2 kg/litre. Always add salt gradually and retest the next day rather than over-salting in one go, as removing excess salt requires dilution.
- Can a salt water pool irritate swimmers' eyes the way a traditional pool can?
- Salt water pools maintained at the correct pH (7.4–7.6) and free chlorine (1–3 ppm) are noticeably gentler on eyes and skin than high-chlorine traditional pools. Stinging eyes in any pool are almost always caused by pH being out of range or combined chloramines building up — not the chlorine level itself. Good salt pool chemistry typically eliminates this issue, which is one reason holiday rental guests and hotel guests often prefer them.
- How often should the salt chlorine generator cell be replaced?
- A quality SCG cell lasts 3–7 years depending on how well it is maintained and the local calcium hardness of the fill water. Greek mains water tends to be moderately hard, so regular cell cleaning and keeping calcium hardness below 400 ppm are important to extend cell life. If the cell is clean but the SCG display warns of low output or requires maximum setting to hold 1–3 ppm chlorine, the cell plates are likely depleted and replacement is due.