The chemicals sitting in your pool shed are the most hazardous things most homeowners handle routinely, and the incidents that happen with them follow a very short list of causes. None of them are exotic. Almost all of them are preventable with storage discipline and a habit or two.
The single most important rule
Never mix pool chemicals with each other, and never mix different types of chlorine products. Combining chlorine products with acid, or combining different chlorine types, can produce toxic gas or a violent reaction. This includes mixing them in a bucket, in a scoop, or in a container that held a different product.
Use a dedicated scoop for each product, and never reuse an empty container for a different chemical. Both of those sound fussy and both of them are exactly how the bad incidents happen.
Storage that keeps you out of trouble
- Separate acids from chlorine products physically, ideally in different areas, never on the same shelf where a spill or leak could bring them together.
- Cool, dry, well ventilated, out of direct sun. Heat degrades chlorine products and can be a hazard in itself. A closed hot shed in a Piedmont August is a poor storage location.
- Off the floor so a wet floor or minor flooding does not reach them, and where a leaking container cannot drip onto another product.
- Original containers only, with labels intact. The label is the instructions and the emergency information.
- Tightly sealed, because moisture in the air degrades many products and some react with it.
- Locked and inaccessible to children and pets. Non-negotiable.
- Away from ignition sources, fuels and fertilizers. Oxidizers stored near combustibles is a real fire risk.
Handling
Read the label every time, particularly with a product you have not used recently. Wear eye protection and gloves. Add chemicals in a well-ventilated place and stand upwind, since the dust and vapor from some products is genuinely unpleasant and harmful.
Two habits worth building. First, always add chemical to water, never water to chemical, because the reverse can cause a violent reaction and splash-back. Second, add one product at a time and allow circulation between, rather than dosing several things at once, which both scrambles your chemistry and risks reactions in concentrated pockets.
Follow the label on waiting periods before swimming. Those numbers exist for a reason and they vary by product.
Muriatic acid deserves respect
It is common, it is effective for lowering pH and alkalinity, and it is the product most likely to cause an injury in a residential setting. Wear eye protection and gloves without exception. Pour slowly to avoid splashing. Store it separately from everything else, in a ventilated location, since the fumes corrode nearby metal including the equipment on your pad.
Consider a dry acid alternative if the handling makes you uncomfortable. It is easier and safer to work with, at somewhat higher cost.
Chlorine tablets and feeders
Tablets in an inline feeder or floating dispenser are convenient, and two things are worth knowing. Never mix tablet types in a feeder without fully cleaning it out, since residue from one product plus a different product is exactly the mixing hazard described above. And most tablets are stabilized, meaning they add cyanuric acid continuously, which builds up over a season and eventually makes chlorine sluggish.
That buildup only comes down by dilution, so it is worth testing cyanuric acid a few times a season rather than discovering it in August.
Spills and emergencies
Keep the product labels and safety data sheets where you can find them, not in the bottom of a bucket. Know where an eyewash source is, and keep a hose available. In a spill, do not use water on a chemical unless the label says to, and do not attempt to neutralize one chemical with another.
For any exposure, follow the label first aid instructions and call Poison Control or 911 as appropriate. Take the container with you if you go for treatment.
Buy what you will use
Chlorine products degrade over time, particularly in heat. Buying a season's worth at a discount and storing it through a hot Piedmont summer often means using a weakened product and storing a hazard longer than necessary. Buy in quantities you will use within a reasonable period.
Dispose of old or unknown products through a household hazardous waste program rather than in the trash or down a drain. Guilford, Forsyth, Davidson and Randolph counties all have collection options.
If chemical handling is not something you want to manage, automated sanitization and regular service take most of it off your plate. Get in touch or call Oasis Pools at (336) 471-0103.