What Should PA and NJ Pool Owners Do Each Spring?

TL;DR: Spring pool opening in Pennsylvania and New Jersey involves removing and storing the winter cover, clearing debris from the pool, reinstalling or starting equipment, testing and balancing chemistry before swimming, and inspecting the pool shell and equipment for any winter damage. A professional spring opening runs $350–$600 and takes 2–4 hours. Done correctly, opening sets up the entire swim season for success; done poorly, it leads to equipment problems and water quality issues that take weeks to resolve. Scott Payne Custom Pools recommends professional opening for the first year and provides guidance for owners who prefer to handle it themselves after that.

Spring opening is the most consequential maintenance event of the PA/NJ pool year. Every problem that went unaddressed at closing, every piece of equipment left with water in it over winter, and every chemistry imbalance from fall will be waiting for you when you pull the cover off. Done right, the pool is swimmable within a week. Done poorly, you spend May troubleshooting instead of swimming.

Here's the complete spring opening process, sequenced correctly.

Step 1: Remove and Inspect the Winter Cover (Day 1)

Before removing the winter cover, pump off any standing water on top of it using a submersible cover pump. Removing a cover heavy with water damages both the cover and risks dumping debris directly into the pool.

Once the water is pumped off, remove the cover with a helper if possible — a wet winter cover is heavy and awkward. Lay it out flat on the lawn, hose it off thoroughly, allow it to dry completely in the sun, and store it clean and dry. A cover stored wet grows mold and degrades quickly.

Inspect the cover for damage: tears, worn grommets, or areas where debris penetrated. A damaged cover needs repair or replacement before next fall. Note any damage now before it's forgotten over the summer.

Step 2: Remove Winterization Equipment and Reinstall Normal Equipment (Day 1)

During closing, return jets, skimmers, and sometimes main drains were plugged with winter plugs. Remove all winter plugs from return jets and skimmers. Remove any antifreeze if it was used (typically only in specific plumbing configurations — not universally required with proper blowout).

Reinstall any equipment that was removed for winter storage: - Return eyeball fittings (if removed) - Skimmer weirs (the floating flap in each skimmer opening) - Pressure gauge on the filter (if removed) - Heater components if any were removed for winter

Reconnect any equipment that was disconnected: heater gas line connections, electrical connections to the subpanel, automation system power.

Step 3: Fill the Pool to Operating Level (Day 1)

The pool was lowered below the skimmer lines at closing. Refill to normal operating level — typically mid-skimmer opening. Use a garden hose connected to your home water supply. If the pool is significantly below normal level, this may take several hours.

While filling: Check for any visible structural concerns — cracks in the coping, tiles that have come loose, visible damage to the pool shell that may have occurred over winter.

Step 4: Prime and Start the Pump (Day 1)

Before starting the pump, fill the pump basket housing with water to assist priming. Open all valves to normal operating position. Start the pump and verify it achieves full prime — water flowing through the system, consistent flow visible at return jets, filter pressure rising to normal operating range.

If the pump loses prime: Check that all valves are in correct position, ensure the pump basket is filled, check for any obvious air leaks at suction fittings. A pump that won't prime after several minutes warrants a call to a service technician.

Start the filter on normal filtration mode. For sand filters, backwash once to clear any debris from the sand bed before switching to filter mode.

Step 5: Start the Heater and Verify Operation (Day 1)

Turn on the heater and set your desired temperature. Gas heaters should ignite within a few seconds. Verify the burner engages and the water temperature begins rising. If the heater displays a lockout code or fails to ignite after two or three attempts, check the gas supply valve is fully open and refer to the heater's manual for fault code guidance.

Heat pumps should start running and the compressor should engage. Note: heat pumps are inefficient below 50°F ambient air temperature — if the overnight temperature is still dropping below 50°F, a gas heater is the more appropriate primary heating source for early spring.

Step 6: Test and Balance Chemistry (Days 1–5)

This is the most important step for getting the pool swimmable quickly and protecting the interior finish coming out of winter.

Test the following parameters:

Opening shock: Add a significant chlorine dose (10x the normal amount) to kill algae and bacteria that may have established themselves over winter, even if the water looks clear. Clear water doesn't mean clean water — algae can be present at levels not yet visible.

Sequence of addition: Adjust alkalinity first, then pH, then calcium hardness, then add shock. Wait 24 hours before testing again. Run the pump continuously for the first 24–48 hours of the opening sequence.

Step 7: Clean the Pool (Days 2–5)

Brush the entire pool surface — walls, floor, step risings — to dislodge any algae or calcium deposits that may have formed over winter. Vacuum the floor to remove debris that settled during the winter. Clean the skimmer baskets and pump basket.

Run the filter continuously for the first 48–72 hours of opening, cleaning or backwashing as filter pressure rises.

Step 8: Inspect for Winter Damage (Day 1–3)

Inspect with fresh eyes: - Pool shell: Any cracks, chips, or surface changes in the interior finish - Coping: Any pieces that have lifted, cracked, or shifted from freeze-thaw cycling - Tile: Any tiles that came loose or cracked - Equipment: Any visible cracks in filter housing, pump housing, or heater - Plumbing: Any joints that leaked over winter (visible water marks or mineral staining) - Fencing and barrier: Any frost-heave damage, gate hardware that needs adjustment

Document any findings with photos and address them before the swim season begins.

Frequently Asked Questions

When should I open my pool in PA or NJ?

The practical answer: when overnight temperatures are consistently above 50°F and you're ready to begin using it within the next few weeks. Most PA/NJ pool owners open between mid-April and Memorial Day. Opening too early (when you won't use it for weeks) means paying heating costs and managing chemistry for a pool you're not swimming in. Opening too late risks warmer water temperatures accelerating algae growth before chemistry is established. The ideal window is typically early to mid-May.

My pool water is green after winter. Is that normal, and how do I fix it?

Yes, green water in spring is common — particularly for pools closed with lower-than-ideal chemistry or covers that allowed light penetration. Treatment: balance pH and alkalinity first (algae is easier to kill in properly balanced water), then shock aggressively (triple or quadruple dose of chlorine), brush the entire surface, run the filter continuously, and clean or backwash the filter every 24 hours as it captures dead algae. Clear water may take 3–5 days. If the pool remains green after 5 days of aggressive treatment, a professional assessment is warranted.

Should I drain and refill my pool when opening?

Not typically. Partial draining — 1/4 to 1/3 of pool volume — makes sense if the total dissolved solids (TDS) are very high, if cyanuric acid has accumulated above 80 ppm, or if the water has a persistent chemistry problem that fresh water would resolve. Full draining of a gunite pool in spring is generally not recommended — the risk of hydrostatic uplift (groundwater pressure lifting an empty pool) is highest in spring when water tables are elevated. Consult with your pool service professional before draining more than 1/3 of pool volume.

What's the most common spring opening mistake?

Not shocking aggressively enough at opening. Many homeowners add a normal maintenance dose of chlorine at opening rather than a true shock dose. Winter creates conditions where bacteria and algae spores are present even if the water appears clear. A proper opening shock (typically 1 pound of calcium hypochlorite per 10,000 gallons of pool water) kills what's there before it has a chance to establish. Under-dosing at opening means fighting algae for the first two weeks of the season.

---