As pool filter sand is considered a hazardous material, you should not simply throw the sand away in your trash can. To properly dispose of the sand, you need to call a disposal expert or take it to a disposal site.
It is categorized as a Health Hazard Carcinogen Category 1A, because it contains crystalline silica (quartz).
The sand in your pool filter needs replacing every three to five years, sometimes even longer if your pool remains in relatively good condition when it's open. If you run your pool filter often all year and have a heavy bather load, the sand may need replacing sooner than three years.
On average, sand should be replaced every 3-5 years. This may be longer if the pool stays clear, or shorter, if the filter runs all the time. The jagged edges of the sand wear down and become smooth as the sand ages.
Crystalline silica (quartz) is not flammable, combustible or explosive. Spills: Use dustless methods (vacuum) and place into closable container for disposal, or flush with water.
Pool filter sand should not be reused because the roughness of the particles that is used to catch unwanted bacteria, contaminates, and debris will be too worn down to be effective. Reused pool filter sand can result in severe contamination of your pool and is not worth the risk.
Because play sand, also known as sandbox sand, is less expensive than pool sand, pool owners are often tempted to try using it in the pool filter. Play sand and pool sand are not the same, however, and are not interchangeable.
If you've noticed that the backwashing cycles have become shorter, then you should check to see if the sand filter is dirty or greasy. If the filter is dirty or greasy, then don't be surprised if it takes on the appearance of sandy lard. When this happens, the water doesn't flow through the sand filter media.
Sand filters often do not filter 100% of algae. The more times a pool is shocked once you have algae, the smaller the particles get. Ideally, turning off the pump for a day will drop all the algae to the bottom and then you vacuum to waste.
Replacement sand for your sand filter typically costs around $25 per 50-pound bag, and your filter may require 100 to 600 pounds or more depending on the size and model. More than likely, you'll need about 350 pounds of sand for an average-sized inground pool filter.
Pool filters do explode and can cause damage to property and serious injury or even death. Since 1982, the Consumer Product Safety Commission has recorded at least 23 incidents of pool filter explosions.
Too much sand and your filter will likely not run correctly or may break when reassembling. Too little sand and you will have cloudy water no matter how much your filter runs.
Waste. This setting draws water from the pool and sends it straight to the waste outlet without passing through the filter. You would use the 'Waste' setting to drain or partially drain your pool or you may use it when vacuuming if there is a lot of dirt and debris on the bottom of your pool.
You can reuse the filter sand if it's still in good shape. Generally, pool filter sand lasts about 5-7 years before it wears out and needs to be replaced (except for very small filters used on aboveground pools, which usually need new sand much sooner.
Can You Backwash Too Much? If you backwash your pool too much i.e. time duration and/or close frequency then yes you can cause a lot of problems. Some problems that can arise from backwashing your sand pool filter too much are: Loss of water – 500+ litres of water can be lost in each backwashing cycle.
At their very best, sand filters only filter down to around 20 microns. Anything finer than that isn't able to be easily filtered and will generally pass right through the filter and back into the pool. As these particles build up they will cause the water to look cloudy.
The most obvious difference when you compare these types of sand is the size of the grains. Pool filter sand has a much smaller particle size. They are no more than half a millimeter in diameter. This small size allows them to trap even very fine matter.
Pool sand filters use sand as the medium of choice to trap dirt and debris. Water flows through the sand while unwanted particles are caught and trapped. Sand meant for use in these filtering systems is specially graded to make sure the individual grains of sand are the right size.
Finding sand in your pool means one or more parts of your sand filter have broken, and the filter is no longer functioning the way it should.
If you see it blowing out into the pool, something is broken. The most common problem is a cracked lateral, which is one of the perforated pipes at the bottom of the filter that catches water that has circulated through the sand.
You can get electrocuted in a swimming pool as a result of: (1) faulty electrical wiring to pool equipment such as underwater lights, pumps, filters and vacuums; (2) no GFCI (Ground-Fault Circuit-Interrupters) protections for outlets and circuits; and (3) electrical appliances and extension cords entering the water.
Even a closed valve can cause a pool pump to catch on fire, which is a rare problem compared to electrical failures in pool pumps.