How often should I test pool water?

2-3 times per week during swimming season. Test for: free chlorine (1-3 ppm), pH (7.2-7.6), and total alkalinity (80-120 ppm). Test calcium hardness and CYA monthly. After heavy rain, a pool party (heavy bather load), or adding chemicals: test again the next day. Test strips ($10-$20 for 50) are quick and convenient. A liquid test kit ($20-$40, like the Taylor K-2006) is more accurate. Take a water sample to a pool store monthly for a free comprehensive analysis.

How much does pool maintenance cost per year?

DIY: $1,000-$2,500/year (chemicals: $300-$800, electricity: $600-$1,800, repairs/parts: $100-$500). With weekly professional service: $3,000-$6,000/year ($100-$300/month for service + chemicals and electricity). Professional opening and closing: $150-$400 each. A variable-speed pump can cut electricity costs by 50-70% ($200-$600/year savings). The biggest controllable cost is the pump — running a single-speed pump 8+ hours/day is expensive.

How do I get rid of green pool water?

Green water = algae growth (usually from low chlorine, high pH, or poor circulation). Fix: brush the walls and floor vigorously (loosen the algae from surfaces), shock the pool with a triple dose of liquid chlorine (raise free chlorine to 20-30 ppm), run the pump 24/7 until clear (2-5 days), brush daily during the process, backwash or clean the filter as needed (the filter is catching dead algae and will clog faster), and vacuum the dead algae from the floor. Prevention: maintain free chlorine at 1-3 ppm, brush weekly, and run the pump 8-12 hours per day.

Should I get a robotic pool cleaner?

For most pool owners who maintain their own pool: yes. A robotic pool cleaner ($300-$1,500) scrubs and vacuums the pool floor and walls independently (has its own motor and filter — does not rely on the pool pump or filter system). Benefits: saves time (set it and forget it), cleans more thoroughly than suction-side cleaners, reduces strain on the pool pump and filter, and uses less electricity than running the pump for vacuuming. Mid-range models ($500-$800) are the sweet spot for most residential pools. Run it 2-3 times per week for a consistently clean pool.

Article

Outdoor Living

Pool Maintenance Guide: Chemicals, Cleaning & Seasonal Care

Lumberama Editorial Team, Pool & Outdoor Living Specialists Jun 18, 2026 15 min read

Water Chemistry Basics

Balanced pool water prevents algae, bacteria, cloudy water, and equipment damage. Test water 2-3 times per week during swimming season (test strips: $10-$20 for 50 strips, or a liquid test kit: $20-$40). The key parameters:

Chlorine (Free): 1-3 ppm (parts per million). Chlorine sanitizes the water (kills bacteria and algae). Below 1 ppm: algae can grow. Above 5 ppm: skin and eye irritation. Add chlorine via: tablets (3-inch tabs in a floating dispenser or inline chlorinator), granular (pour directly into the water), or a salt chlorine generator (converts salt to chlorine automatically).

pH: 7.2-7.6 (ideal: 7.4). Below 7.2 (acidic): corrodes metal equipment, etches plaster, causes eye irritation. Above 7.6 (basic): chlorine is less effective, water gets cloudy, scale builds up. Raise pH: add soda ash. Lower pH: add muriatic acid or sodium bisulfate.

Total Alkalinity: 80-120 ppm. Acts as a pH buffer (prevents pH from bouncing around). Low alkalinity: pH fluctuates wildly. High alkalinity: pH is hard to adjust and water is cloudy. Raise: add sodium bicarbonate (baking soda). Lower: add muriatic acid.

Calcium Hardness: 200-400 ppm. Low: water is aggressive and corrodes equipment and plaster. High: scale deposits on surfaces and equipment. Raise: add calcium chloride. Lower: partially drain and refill with fresh water.

Cyanuric Acid (CYA/Stabilizer): 30-50 ppm. Protects chlorine from UV degradation (sunlight destroys chlorine without CYA). Too high (above 70-80): chlorine becomes less effective (called chlorine lock).

Weekly Maintenance Routine

Skim the surface: Remove leaves, bugs, and debris with a leaf skimmer (daily if there are trees nearby).

Brush walls and floor: Weekly brushing prevents algae from gaining a foothold (use a nylon brush for vinyl/fiberglass, a stainless steel brush for plaster/concrete).

Vacuum: Manual vacuum or automatic pool cleaner (robotic: $300-$1,500, suction-side: $100-$400, pressure-side: $200-$600).

Clean the skimmer and pump baskets: Weekly (clogged baskets reduce flow and strain the pump).

Backwash/clean the filter: When the pressure gauge reads 8-10 psi above the clean starting pressure (typically every 2-4 weeks for sand and DE filters). Cartridge filters: remove and hose off every 2-4 weeks.

Filter Types

Sand filter: Water passes through a bed of special filter sand. Filters down to 20-40 microns. Lowest maintenance. Backwash to clean. Replace sand every 5-7 years ($50-$200). The most popular type.

Cartridge filter: Water passes through a pleated polyester cartridge. Filters down to 10-15 microns (cleaner water than sand). No backwashing (remove and hose off). Replace cartridges every 1-3 years ($50-$200).

DE (diatomaceous earth) filter: Water passes through grids coated with DE powder. Filters down to 3-5 microns (the cleanest water). Backwash and add fresh DE. The best filtration but the most maintenance.

Seasonal Care

Opening (spring): Remove the cover, reconnect equipment, fill to normal level, run the pump, shock the pool (super-chlorinate to kill anything that grew over winter), balance chemistry, and brush/vacuum thoroughly. Takes 1-3 days to get clear water.

Closing (fall/winter): Balance chemistry, add winterizing chemicals (algaecide, enzyme treatment), lower the water level (below the skimmer), blow out plumbing lines with air (to prevent freezing), add antifreeze to plumbing (in freezing climates), and install the winter cover. A mesh safety cover ($1,500-$3,500 installed) is the safest and most durable option.