Spring in Cyprus arrives early. By late March, daytime temperatures are already climbing past 20°C, and pool owners across Limassol, Paphos, and Larnaca start eyeing the water. If your pool sat largely untouched through winter — or ran on a reduced maintenance schedule — there’s real work to do before anyone gets in. This guide walks through exactly what that looks like, in the right order.
Assess What You’re Actually Dealing With
Before you touch a chemical or switch anything on, spend ten minutes looking carefully at the pool and its surroundings.
Check the water clarity. In Cyprus, pools that ran through winter without a cover often accumulate algae growth and a noticeable layer of sediment from dust storms and Saharan deposits. Even a pool that looks clear from a distance may have a green or grey tinge close up, or visible debris settled on the floor. Note it all before you act.
Check the waterline. Cyprus has notoriously hard water — calcium hardness levels frequently exceed 400 ppm in areas supplied from groundwater — and winter evaporation leaves calcium scale deposits visible as a white ring around the tile line. This is one of the first things guests and rental tenants notice, so it needs addressing early.
Check the equipment. Look at the pump, filter, and any automation or heating equipment. If anything was winterised or partially shut down, confirm there’s no visible cracking in pipe fittings, no seized valves, and no debris blocking the skimmer baskets. Cyprus winters are mild, so freeze damage is rare, but physical wear from UV exposure, heat cycling, and hard water scale inside pipe runs is common.
Clean First, Then Balance
The temptation is to pour in chlorine immediately and hope for the best. That approach wastes chemical and rarely works well. The correct sequence is: clean, then balance, then sanitise.
Physical cleaning
Brush the walls and floor thoroughly to dislodge any algae or biofilm that has formed over winter. Vacuum to waste if there is significant sediment — vacuuming to filter when the pool is this dirty just pushes debris through the filtration system and back into the water. If your pool has a main drain, confirm it is drawing correctly.
Clean the skimmer and pump baskets. Rinse or backwash the filter. If you have a sand filter that hasn’t been backwashed in months, do a full backwash and rinse cycle before bringing the system up to full speed.
Water testing
Test the water before adding anything. The parameters that matter most at spring opening are:
- pH — target 7.2 to 7.6. Cyprus tap and well water often runs alkaline, so you may need pH reducer.
- Total alkalinity — target 80 to 120 ppm. This buffers your pH and makes it easier to hold a stable reading.
- Calcium hardness — target 200 to 400 ppm. In many parts of Cyprus this will already be at or above the upper end, which increases the risk of scale formation on the pool surface and inside the heat exchanger if you run a heater.
- Free chlorine — target 1 to 3 ppm for normal operation, though you’ll likely shock the pool at opening.
- Cyanuric acid (stabiliser) — target 30 to 50 ppm. This is particularly important in Cyprus. The UV index here is among the highest in Europe, and unstabilised chlorine degrades rapidly in direct sunlight. Without adequate stabiliser, you can add chlorine in the morning and have almost none left by afternoon.
Adjust alkalinity first, then pH, then add your sanitiser. This order matters because pH is easier to stabilise once alkalinity is correct.
Shocking the pool
At spring opening, shock treatment is almost always worthwhile. Use a high-dose chlorine shock — typically calcium hypochlorite or liquid chlorine — to bring free chlorine up to 10 ppm or higher for several hours. Run the pump continuously during and after shocking. Retest before declaring the pool ready to swim in.
Filter Run Times and the Cyprus Summer Reality
Once the pool is balanced and clean, your focus shifts to maintaining it through what will quickly become a hot, high-UV, busy season.
In winter, many owners run their pumps for four to six hours a day. By May that needs to increase, and by July and August, eight to ten hours is often the minimum to maintain water quality. If you’re running a holiday rental with high bather loads, you may need more. Inadequate filtration time is behind a significant proportion of the water quality problems we’re called out to fix during summer.
Dust storms from North Africa — most common in spring and early summer — can drop a visible layer of fine particles on the pool surface and water overnight. After a heavy dust event, check your filter and be prepared to backwash more frequently than usual. These fine particles can also affect water chemistry, so test after a major storm rather than waiting for your normal schedule.
Surface and Tile Care
The calcium scale along the waterline doesn’t clean itself. For light deposits, a tile-specific scale remover and a non-abrasive pad will handle most of it. For heavier build-up, particularly on rough plaster finishes or natural stone coping common on older Cypriot villas, you may need an acid-based cleaner applied carefully and rinsed thoroughly. Do not use acid-based cleaners without appropriate protection, and keep them away from the pool water.
If your pool has a painted or older plaster finish that has stained, yellowed, or developed rough patches over winter, this is the moment to assess whether a resurface is needed before the season starts properly — not in July when the pool is in daily use.
Equipment Check Before You Rely On It
Run the pump and filter for a full 24 hours and check everything is performing correctly. Confirm the pressure gauge on your filter reads within the normal range. If you have an automatic chlorinator or salt chlorination system, calibrate it and confirm the cell is clean. Salt cell scale is a persistent issue in Cyprus given the water hardness. A cell that looks fine visually may still have reduced output from mineral build-up on the plates.
If you have a pool heater and plan to use it in spring before the water warms naturally, check the heat exchanger for scale and confirm the flow rate is adequate. Restricted flow through a scaled heat exchanger shortens its lifespan considerably.
If you’d rather hand all of this to someone who does it every day, we’re available across Limassol, Paphos, Nicosia, and Larnaca. Call us or send an email through the contact page on poolcleaningcyprus.com and we’ll arrange a spring opening visit before the season gets away from you.