With the weather heating up, pool season is officially here! Whether you’ve had a backyard pool for years or you’re dreaming of installing one, there’s one thing every pool owner needs to stay on top of — safely storing pool chemicals. While we’re all for keeping a low-tox home, pool chemicals and quality pool supplies are a necessary part of keeping your water healthy and crystal clear. (For the record, we’re big fans of a chlorine–salt mix with a dash of magnesium for extra wellness benefits — but we digress!)
Chlorine, acids, stabilisers, algaecides… whatever you use to keep your pool sparkling, it’s important to know how to store these products with care. Not only does proper storage keep your household safe, it also helps your chemicals work better and last longer. Here’s everything you need to know to store pool chemicals safely throughout every season.
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Choose a cool, dry and ventilated storage area
Pool chemicals are sensitive to heat, moisture, and poor airflow. High temperatures can cause liquids to expand, powders to clump, and some chemicals to react. Moisture can cause products like chlorine granules to break down or become unstable. A well-ventilated, dry space prevents fumes from building up and protects the chemicals from degrading. A garage, shed, or outdoor storage cabinet can work well as long as the area stays cool and is protected from direct sunlight.
Keep chemicals in their original containers
We love a perfectly matching storage area as much (probably more!) as the next person but when it comes to pool supplies, they should always remain in the packaging they came in. These containers are designed for safe storage, with proper ventilation, chemical-resistant materials, and clear labels. Pouring chemicals into other bottles creates serious safety risks, including cross-contamination, incorrect handling, and dangerous reactions. If labels start to fade or peel, re-label the container immediately to avoid confusion later.
Separate chemicals based on type
Not all pool chemicals can be stored together safely. Chlorine should always be kept away from acids, as combining them can produce toxic gas. Liquids should be stored on lower shelves to prevent leaks spilling downward onto other items. Dry chemicals like stabilisers should be kept separate from liquids entirely. Creating clear zones for each type of chemical prevents accidental mixing and ensures safe handling every time you open the storage space.
Avoid exposure to sunlight and extreme temperature
UV light and heat can compromise the effectiveness of pool chemicals. Sunlight causes the breakdown of chlorine and other sanitising agents, reducing their shelf life. Extreme cold can also affect liquids by causing expansion or separation. Keeping your supplies in a shaded, temperature-stable spot protects their quality and helps ensure they work as intended when added to your pool.
Store chemicals out of reach of children and pets
It goes without saying but pool supplies should be stored in a locked cabinet or on high shelves to prevent access by children or animals. Even small amounts of certain chemicals can be hazardous if ingested or handled improperly. If your storage area is in a garage or shed, ensure doors are closed and secured after use. Consider installing a lock or latch for additional safety.
Never store anything above pool chemicals
Storing items on top of chemical containers can lead to accidental spills or punctures if something falls. Boxes, tools, or garden equipment should always be placed on separate shelves or in a different part of the shed. Chemicals themselves should be kept on sturdy, stable shelving that can handle their weight without risk of collapse.
Keep containers tightly sealed after every use
Moisture, air, and contaminants can quickly degrade pool chemicals if the lid is not sealed properly. Always check that caps and lids are tightened before placing a product back on the shelf. If you notice any damage to the seal or packaging, replace the product. Using compromised chemicals can affect water balance and create unnecessary safety hazards.
Inspect your storage space regularly
Once every month, take a quick look at your storage area. Check for leaks, spills, corrosion on containers, or unusual smells. If you spot any issues, address them straight away. Cleaning up small spills and removing expired products keeps your space safe and reduces the risk of chemical reactions. Most pool chemicals have expiration dates, so just like when decluttering your pantry it’s important to review the expiry of chemicals so you’re only using effective, high-quality products.
Handle chemicals carefully when moving them
Even when stored properly, chemicals can become hazardous if dropped, shaken, or handled roughly. Lift containers with two hands, avoid stacking them, and keep them upright during transport. When opening a container, stand back to avoid inhaling fumes. Following cautious handling habits prevents accidents both in storage and during routine pool maintenance.
Dispose of old or expired products correctly
Never throw pool chemicals into regular household rubbish or pour them down drains. Most local councils have disposal guidelines for hazardous materials, including old chlorine, acids, and algaecides. Contact your local waste facility to confirm the right way to dispose of unused or expired products. Proper disposal protects the environment and keeps your home safe from chemical exposure.
Storing chemicals correctly is essential for getting the most out of your pool supplies. When your products are kept in good condition, they work more effectively, balance your pool faster, and last longer. It also reduces the risk of accidents and protects your family. By maintaining a cool, dry, organised, and secure storage area, you can enjoy clean and healthy water throughout every season.
