After a long Cape Cod winter, there’s no better feeling than pulling back the pool cover and getting ready for the first swim of the season. But a little preparation goes a long way between removing the cover and jumping in. Opening a pool correctly — in the right order, with attention to chemistry and equipment — means you’ll be swimming in crystal-clear water sooner and with fewer headaches along the way.
Step 1: Remove and Store the Cover
Start by removing any standing water or debris from the top of the cover before you pull it off. A cover pump is ideal for removing water, and a leaf blower can clear loose debris. This prevents all that gunk from falling into your pool as you remove the cover.
Once the cover is off, clean it thoroughly before storing it. A cover that goes into storage still wet or dirty is a cover that will come out next fall with mildew, staining, or damage. Use a cover cleaner, let it dry completely, and fold or roll it for storage in a cool, dry place.
Step 2: Reinstall Equipment and Remove Winter Plugs
Remove the winter plugs from your return lines and reinstall any equipment that was removed for storage — ladders, handrails, diving boards, and anything else taken off during closing. Reconnect the pump, filter, and heater, and make sure all fittings are tight. Replace the pressure gauge, sight glass, and any other removable equipment on the filter.
Fill the pool back up to the proper operating level — typically midway up the skimmer opening. Use a garden hose, and if you have a large pool, plan for this to take several hours.
Step 3: Start Up the Equipment
Before firing up the pump, make sure the pump basket is clean and properly seated, the air relief valve on the filter is open, and all valves are in their correct positions. Prime the pump if necessary, then turn it on and check for leaks at all fittings and connections. It’s not uncommon for a seal or O-ring to fail over the winter, so take a few minutes to look everything over while the system is running.
Let the pump run continuously for 24 to 48 hours as you work through the opening process. This circulates water through the filter and helps distribute chemicals evenly throughout the pool.
Step 4: Test and Balance the Water
After the pump has been running for several hours, take a water sample and test it — either with a home test kit or by bringing a sample to your pool supply store for a professional analysis. After a winter under cover, your water chemistry will almost certainly need adjustment.
Start with total alkalinity, then adjust pH, then address chlorine. Shock the pool with a full dose of chlorine to sanitize any algae or bacteria that may have developed over the winter, even if the water looks clear. Add algaecide if needed, and run the filter continuously until the water is clear and the chemistry is balanced.
Depending on how the pool wintered, you may need to vacuum accumulated debris from the bottom, brush the walls, and possibly run a clarifier or floc to clear cloudy water. With a little patience and the right products, most pools are swim-ready within a day or two of opening — and that first swim of the summer makes every step worth it.