Inground Pool Opening Checklist: 10 Must-Have Supplies

As the weather warms and the promise of Memorial Day weekend approaches, the race is on to transform your winterized pool into a sparkling oasis. Neglecting the proper opening protocol can turn your initial swim into a chemistry experiment, costing you both time and money during the peak of the season. Equipping your equipment shed with the correct gear ensures a smooth, trouble-free opening that keeps your water clear all summer long.

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Key Steps to Take Before Removing Your Pool Cover

Before you even think about unhooking the springs or straps of your winter cover, you must address the debris resting on top of it. Allowing rotten leaves, twigs, and stagnant winter water to dump into your pool will instantly undo months of winter protection. A thorough sweep and pump-out of the cover surface prevent organic matter from overwhelming your water chemistry right at the start.

Once the surface is clear, inspect the water level underneath the cover before pulling it back. If the level has dropped significantly over the winter, you may have a leak that needs to be addressed before firing up the filtration system. Adding fresh water to bring the pool up to its normal operating level—usually halfway up the skimmer mouth—is essential for proper circulation.

Finally, gather your seasonal startup supplies and organize your deck space to allow for easy access around the perimeter. Taking these preliminary steps reduces the risk of accidental cover tears and keeps contamination to an absolute minimum.

Pool Cover Pump – Little Giant APCP-1700

An accumulation of winter rain and melted snow creates a heavy, toxic stew on top of solid pool covers that must be removed before opening. Attempting to lift a wet cover manually often leads to structural damage or dumps gallons of dirty water directly into your clean pool. A dedicated cover pump quickly and safely drains this liquid weight, preserving the integrity of both your cover and your water.

The Little Giant APCP-1700 is the industry standard for this task because of its automatic activation and robust flow rate. This pump features a built-in mechanical float switch that automatically turns the unit on when water reaches two inches and shuts off when the surface is clear. This hands-off operation prevents the pump from running dry, extending its overall lifespan.

• Flow Rate: Up to 1,745 gallons per hour
• Power Cord: 25-foot heavy-duty cord
• Discharge Connection: Standard 3/4-inch garden hose thread
• Intake Screen: Removable for easy cleaning of leaf debris

Before using this pump, clear the intake screen of heavy leaf buildup to maintain maximum flow and prevent motor strain. While it handles shallow water easily, it is not designed to pass large solids, so keep it clear of twigs and heavy sludge. This automatic pump is perfect for owners of solid safety or tarp covers, but unnecessary for those with free-draining mesh covers.

Pool Brush – SweepEase Stainless Steel Brush

Algae spores and scale deposits cling tightly to pool walls and floors during the long winter months of stagnation. Simply pouring chemicals into the water will not clear this buildup; you must physically disrupt these biofilms to allow your sanitizer to penetrate. A heavy-duty pool brush is your primary weapon for breaking up these stubborn organic layers.

The SweepEase Stainless Steel Brush solves the biggest pain point of pool brushing: the exhausting physical strain of keeping the brush pressed against the walls. Its patented aerodynamic spoiler utilizes water flow to lock the brush against the pool surface with every slice. Built with professional-grade stainless steel bristles, it slices through tough black algae and calcium scale with minimal effort.

• Width: 18 inches
• Bristle Material: AISI 316 Marine Grade Stainless Steel
• Handle: Heavy-duty aluminum quick-release V-clip
• Sizing: Fits standard 1-1/4 inch telescoping pool poles

Caution: This brush is exclusively designed for plaster, gunite, and concrete pools. The stiff steel bristles will tear vinyl liners and scratch fiberglass surfaces instantly, so vinyl and fiberglass owners should opt for a nylon-bristled version instead. For concrete pool owners, however, this tool cuts brushing time in half and delivers superior scouring power.

Water Test Kit – Taylor Technologies K-2006

Opening a pool blind without precise chemical readings leads to wasted money, cloudy water, and chemical imbalances. Cheap test strips often provide vague color matches that can easily mislead you about your stabilizer or pH levels. A professional-grade liquid test kit provides the exact parts-per-million (PPM) metrics needed to calculate your chemical additions accurately.

The Taylor Technologies K-2006 is the gold standard for residential and commercial pool chemistry management. Utilizing FAS-DPD titration, it allows you to measure free and combined chlorine levels down to 0.2 ppm with a distinct color-change endpoint. It includes comprehensive tests for pH, acid demand, base demand, total alkalinity, calcium hardness, and cyanuric acid (stabilizer).

• Testing Method: Liquid reagent drops and titration
• Chlorine Range: 0.2 ppm to 20.0 ppm
• Included Guide: Waterproof chemical treatment wheel and manual
• Reagent Sizes: 0.75-ounce bottles

Keep in mind that these liquid reagents degrade over time, especially when exposed to extreme heat or sunlight, and should be replaced annually. There is a slight learning curve to matching the drop counts and reading the meniscus, but the included instructions are incredibly clear. This kit is ideal for detail-oriented pool owners who want precise control, while those looking for a simple, approximate reading may find it overly detailed.

Pool Shock – HTH Super Shock Treatment

After months of winter dormancy, your pool water contains organic contaminants, pollen, and microscopic algae spores that chlorine must destroy. Normal chlorine levels are insufficient for this initial cleanup; you must rapidly raise the free chlorine level to “shock” the water. This process oxidizes contaminants and sanitizes the environment so your daily sanitizer can do its job.

The HTH Super Shock Treatment stands out because of its high concentration of Calcium Hypochlorite (Cal-Hypo), which delivers a massive sanitizing punch. With 73% active chlorine, this fast-dissolving granular formula quickly sanitizes water without adding stabilizer (cyanuric acid) to your pool. This prevents your water from locking up chemically, a common issue with cheap, stabilized shock products.

• Active Ingredient: 73% Calcium Hypochlorite
• Dosage: 1 bag treats up to 13,500 gallons
• Form: Fast-dissolving granules
• Compatibility: Plaster, gunite, concrete, and vinyl pools

Because Cal-Hypo contains calcium, it will slightly raise your pool’s calcium hardness levels, which should be monitored if you have naturally hard water. Always pre-dissolve the granules in a bucket of pool water before pouring to avoid bleaching vinyl liners or leaving white spots on plaster. This product is perfect for pool owners needing an immediate, powerful sanitation boost, but should be used cautiously in pools already dealing with high calcium hardness.

Algaecide – PoolRx Algaecide Blue Unit

Once the winter cover is removed and sunlight hits the warming water, algae can bloom with alarming speed. Even if your water looks clear initially, microscopic spores are waiting for the right conditions to multiply. A preventative algaecide provides a continuous line of defense, stopping algae colonization before it can take over.

The PoolRx Algaecide Blue Unit uses an innovative mineral technology that simplifies algae prevention for up to six months. By releasing a proprietary blend of copper, silver, and zinc minerals into the water, it constantly sanitizes and prevents algae growth. This continuous mineral action dramatically reduces your pool’s overall chlorine demand, saving you money on chemical sanitizer over the season.

• Lifespan: Up to 6 months of active mineral release
• Capacity: Treats pools from 7,500 to 20,000 gallons
• Placement: Drops directly into the pump basket or skimmer
• Compatibility: Safe for all pool finishes and sanitizing systems

You must ensure your pool’s copper levels do not exceed 0.3 ppm to prevent metallic staining on plaster walls and light-colored swimwear. It is also critical to clear any active algae blooms with shock before installing the unit, as it is a preventative measure, not a quick-cure shock. This unit is perfect for busy pool owners looking for passive, season-long algae protection, but less suitable for those who prefer purely chemical-free mineral balances.

Phosphate Remover – Natural Chemistry Phosfree

Phosphates enter your pool through rain, organic debris, lawn fertilizer run-off, and tap water during the off-season. Because phosphates are the primary food source for algae, high levels will feed recurring blooms even if you maintain proper chlorine levels. Removing these compounds starves the algae, making your pool far easier to maintain during hot summer days.

The Natural Chemistry Phosfree is a highly concentrated lanthanum-based formula designed to precipitate phosphates out of the water quickly. Unlike other treatments that can take weeks to work, this liquid formula binds to phosphates on contact, allowing your pool filter to capture them. It reduces phosphate levels down to near-zero without affecting your pH or alkalinity levels.

• Active Ingredient: Lanthanum chloride formula
• Dosage: Varies based on tested phosphate levels
• Target Level: Limits phosphates to under 100 ppb (parts per billion)
• Filter Requirement: Safe for cartridge, sand, and DE filters

Be prepared for this product to turn your pool cloudy white immediately after application; this is a normal sign that the formula is binding to the phosphates. You must run your pool filter continuously for 24 to 48 hours after application and be ready to clean or backwash the filter as pressure rises. This treatment is highly recommended for pools surrounded by heavy foliage or lawns, but may be unnecessary if your starting phosphate levels are already below 100 ppb.

Leaf Rake – ProTuff 18-Inch Pool Net

No matter how careful you are when removing the pool cover, some winter debris will inevitably sink to the bottom. Attempting to vacuum heavy leaf piles can clog your plumbing lines or overwhelm your pool pump basket. A heavy-duty leaf rake with a deep bag allows you to scoop large volumes of organic matter off the floor before starting the filtration system.

The ProTuff 18-Inch Pool Net is engineered to withstand the immense drag and weight of scooping wet, heavy leaves from the pool bottom. It features a rigid, warp-resistant aluminum frame wrapped in a protective plastic rim that protects your pool finish from scratches. The deep, double-stitched nylon mesh bag is designed to scoop large piles of debris without tearing or spilling.

• Frame Width: 18 inches
• Bag Depth: 15 inches of fine mesh
• Frame Material: Heavy-duty aluminum alloy
• Warranty: Lifetime replacement guarantee

Scooping a deep pool requires a high-quality telescoping pole, which is sold separately and must be purchased to use this tool. When full of wet leaves, the net can become incredibly heavy, demanding a sturdy grip and proper leverage to lift out of the water. This rake is a must-have for pools under trees, but may be overkill for screened-in pools that experience minimal debris fall.

Robotic Pool Cleaner – Dolphin Nautilus CC Plus

Once the heavy debris is scooped out, fine silt, dirt, and microscopic particles remain settled on the pool floor. Manually vacuuming a pool at opening takes hours of tedious physical labor and puts extra strain on your pool’s main filtration system. A robotic pool cleaner operates independently, scrubbing the walls and floor while filtering the water down to the micron level.

The Dolphin Nautilus CC Plus is a premier choice for inground pools up to 50 feet due to its dual scrubbing brushes and intelligent navigation. It climbs walls easily, cleaning the waterline where oils and dirt accumulate, and maps your pool for complete coverage. Its top-access cartridge filters are easy to clean, eliminating the need to deal with messy debris bags.

• Pool Size Limit: Inground pools up to 50 feet
• Filter Type: Dual top-load fine cartridge filters
• Cleaning Cycle: 2 hours
• Cable Length: 60-foot tangle-free swivel cable

Do not use this robotic cleaner to vacuum up large twigs or thick piles of wet leaves, as these can jam the impeller and damage the internal motor. Store the robot out of direct sunlight when not in use to prevent UV damage to the plastic housing and rubber tracks. This investment is perfect for pool owners who value their weekends and want automated, effortless floor maintenance, but is not necessary for those on a tight budget.

Filter Cleaner – Pleatco FilterWash Tablets

Your pool filter works overtime during the opening process, trapping fine dust, pollen, organic oils, and chemical residue. Simply rinsing cartridge filters or backwashing sand filters with water is not enough to dissolve deep-seated grease and calcium scale. A specialized filter cleaner strips away these microscopic blockages, restoring proper water flow and system pressure.

The Pleatco FilterWash Tablets provide a highly convenient, pre-measured solution that eliminates the mess of liquid acid washes. These effervescent tablets dissolve quickly in water, creating a deep-penetrating bath that releases dirt and oils embedded in cartridge pleats. Unlike harsh muriatic acid treatments, this formula cleans thoroughly without degrading the structural integrity of your filter’s polyester fabric.

• Form: Effervescent tablet
• Types Available: Formulations optimized for cartridge or sand/DE filters
• Dosage: 1 tablet per cartridge element
• Soak Time: 20 to 30 minutes

You must have a large bucket or clean trash can dedicated to soaking the filter cartridges so they can be completely submerged in the cleaning solution. After soaking, rinse the cartridges thoroughly with a high-pressure garden nozzle until the water runs clear and free of foam. This product is ideal for cartridge and DE filter owners looking to prolong filter life, but is not designed for direct application to sand filters without specialized procedures.

O-Ring Lubricant – Jack’s Multilube

A pool’s plumbing system relies on various rubber O-rings to create airtight seals around the pump lid, chlorinator, and slide valves. Over the winter, these rubber components dry out, shrink, and crack, leading to frustrating air leaks that can prevent your pump from priming. Applying a fresh layer of high-quality lubricant restores the seals and protects the rubber from chemical degradation.

Jack’s Multilube is a professional-grade, silicone-based lubricant designed specifically for wet environments. Unlike petroleum-based jellies, which swell and destroy rubber over time, this silicone formula remains stable and water-resistant. It creates a durable, slick barrier that prevents O-rings from sticking, drying out, or tearing during maintenance.

• Base Material: 100% silicone-based formula
• Size: 4-ounce squeeze tube
• Water Resistance: High water washout resistance
• Application: Safe for rubber, plastic, and metal surfaces

Always clean the O-ring groove of any old debris, sand, or grit before applying a thin, even coat of this lubricant. Applying too much lubricant can attract dirt, which may compromise the seal or scratch the plastic pump lid. This lubricant is an absolute necessity for every pool owner’s winterized prep kit, preventing costly air leaks and premature parts replacement.

How to Maintain Balanced Water After the Opening

Once your pool is open and the water is clear, your primary focus shifts to maintaining chemistry balance throughout the spring. Run your filtration system for at least 8 to 12 hours a day to keep water circulating and prevent stagnant zones where algae can thrive. Test your water weekly using your liquid test kit, paying close attention to pH and free chlorine levels as temperatures rise.

Ensure your Total Alkalinity is balanced between 80 and 120 ppm, as this acts as a buffer to prevent wild pH swings. Keep your stabilizer (cyanuric acid) level between 30 and 50 ppm to protect your chlorine from being destroyed by the sun’s UV rays. If your pool is heated, check the calcium hardness regularly to prevent scale formation on heaters or etching on plaster surfaces.

Monitor your filter pressure gauge daily during the first few weeks after opening your pool. A 10 PSI rise over your clean starting pressure indicates that the filter has captured fine winter debris and needs a backwash or manual cleaning. Keeping a close eye on these physical and chemical metrics guarantees your pool remains safe, sanitary, and ready for your Memorial Day celebration.

Conclusion

Opening your pool for the season is a systematic process that rewards patience and the right choice of tools. By methodically clearing debris, sanitizing the water, and balancing your chemistry early, you avoid the frustrating cycle of fighting green water during the summer. Gather your gear now, follow the steps carefully, and step into the warm weather with a crystal-clear pool ready for action.