Introduction
This guide outlines essential pool maintenance practices, focusing on the importance of maintaining the circulation system and chemical cleaning to ensure a clean and clear pool with minimal effort.
Pool Components and Features- Pool Ladders: Should be stable and available in polished stainless steel, with fixed or hinged options.
- Jet Swim: Enhances swimming for exercise, made of stainless steel with a bronze pump.
- Water Flow: High-quality skimmers and inlet jets are crucial.
- Heating: Stainless steel heating products extend pool use.
- Lighting: Includes lamp units and accessories for evening ambiance.
- Filtration: Sand filters and pumps are essential for maintaining clear water.
Pool Schematic
The schematic includes components such as a heat exchanger, electric heater, inlet, skimmer, pump, filter, main drain, light, thermostat, and boiler.
Commissioning and Maintenance Procedures- Starting a Pool: Steps for commissioning a newly-filled pool or starting in spring, including filling, backwashing, and adjusting pH and chlorine levels.
- Vacuum Cleaning: Instructions for using the vacuum head and hose, and maintaining the skimmer filter basket.
- Backwashing: Steps for backwashing the filter when pressure increases.
Water Circulation and Filtration- Skimmer: Removes debris from the water surface, requires regular emptying.
- Pump: Creates suction and forces water through the filter and heater.
- Filter: Sand filter removes particles, requires backwashing when pressure increases.
- Heating: Options include electric heaters, heat exchangers, solar panels, or heat pumps.
- Inlet Jets: Return cleaned and heated water to the pool.
Chemical Treatment- Disinfection: Chlorine or bromine used to kill bacteria, algae, and fungi.
- pH Adjustment: Ideal range is 7.2 to 7.6 for effective disinfection.
- Algae Control: Regular chlorination prevents algae growth.
- Flock Dosing: Enhances filtration by forming larger particles.
Chlorination Methods- Daily Chlorination: Uses calcium hypochlorite tablets.
- Shock Chlorination: Provides a rapid chlorine boost.
- Weekly Chlorination: Uses slow-acting trichlorisocyanuric acid tablets.
- Halobrom: An alternative to chlorine with a wider pH range and no chemical smell.
Water Quality Parameters- pH: Optimal at 7.4 to prevent damage and irritation.
- Chlorine Levels: Free chlorine should be 0.5-1.5 ppm.
- Total Alkalinity: Should be 60-100 ppm for calcium hypochlorite and 90-125 ppm for trichlorisocyanuric acid.
- Calcium Hardness: Should be 100-300 ppm to prevent lime precipitation or aggressive water.
Water Balance and Maintenance
The balance of pool water is determined by measuring temperature, pH, calcium hardness, and total alkalinity. The water balance index is calculated using the formula: Index value = pH + TF + CF + AF - 12.1, where TF, CF, and AF are factors for temperature, calcium hardness, and total alkalinity, respectively. An index above +0.5 indicates lime-precipitating water, while below -0.5 indicates aggressive water. The Autocheck II photometric test kit is recommended for accurate measurements.
Testing and Adjustments
Test kits are used to measure free chlorine, total chlorine, pH, total alkalinity, calcium hardness, and cyanuric acid. DPD test kits are available in manual and photometric versions. For accurate results, avoid touching test tablets and follow proper procedures for using test strips.
Common Problems and Solutions- Eye and Skin Irritation: Adjust pH or shock chlorinate with calcium hypochlorite.
- Limescale Deposits: Adjust pH and determine water balance.
- High Chlorine Levels: Use a chlorine reducing agent.
- Algae: Adjust pH, shock chlorinate, and use anti-algal agents.
- Cloudy Water: Shock chlorinate and check filtration.
- Discoloured Water: Adjust pH, shock chlorinate, and use a flocking agent.
Winter Shutdown Procedure
For pools that can withstand freezing, adjust pH to 7.2-7.6, circulate water, and reduce chlorination until the temperature falls below +7°C. Follow a detailed shutdown procedure including cleaning, backwashing, removing equipment, and adding anti-algal agents. Cover the pool to protect it during winter.