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90% of green Algarve pools have pH above 7.8. At that level, chlorine is 80% less effective. Fix pH to 7.0–7.2 first, then shock.
Usually high calcium hardness (Algarve water averages 350ppm) or low alkalinity. Test everything before adding chemicals.
Counter-intuitive: stinging eyes usually means too little chlorine. Combined chloramines cause the sting — shock treats them.
Algarve water is very hard. Scale forms above 400ppm calcium or pH above 7.8. Monthly scale inhibitor prevents it.
Enter your current water test results. Get exact chemical doses to restore perfect balance — calibrated for Algarve hard water.
Higher than standard due to Algarve's extreme UV (UVI 8–11 in summer). Chlorine is destroyed much faster here than in northern Europe.
Lower than the textbook 7.4–7.6 because Algarve hard water pushes pH up naturally. Aim lower so it drifts into range.
Buffers pH swings. Low alkalinity causes rapid pH changes. High alkalinity makes pH impossible to adjust.
Essential for outdoor pools to protect chlorine from UV. Above 80ppm it locks chlorine — drain partially if too high.
Find the exact output (kW) for your pool. Avoid buying the wrong size and wasting hundreds of euros on energy bills.
COP 5 = €1 of electricity produces €5 of heat. In the Algarve look for COP 5.5+. Inverter models are 20–30% more efficient than fixed-speed.
Inverter heat pumps are far quieter (under 45dB vs 60dB). Worth the €200–400 premium — pays back in the first season through energy savings.
Portuguese off-peak electricity (22:00–07:00) is 30–40% cheaper. Program your pump to run overnight. A thermal cover retains the heat until morning.
Salt pool? You must have a titanium (not stainless steel) heat exchanger. Saltwater corrodes standard exchangers rapidly.
Calculate exactly how much salt to add. Get optimal chlorinator settings. Prevent the most common mistake: adding too much.
Most chlorinators work optimally here. Check your manual for exact specs — going outside the range significantly reduces chlorine output.
Too much salt is very hard to remove — you must dilute by draining water. Add in 20 kg batches, test after 24h circulation, never add the full amount at once.
Never use table salt, sea salt, or rock salt. Anti-caking agents introduce contaminants that cloud the water and damage the chlorinator cell.
Hard Algarve water causes calcium scale on electrolytic cells. Inspect every 3 months, descale with diluted hydrochloric acid when needed.
AI responses are guidance only. For complex structural problems, consult a verified professional.