7/21/2023 0 Comments 20 silica pool sandIn-ground pool filters require a heavier grain of sand above 0.5 millimeters so that the more powerful filtration system can be used without worrying about filling the pool with sand.īeyond the flow rate of the filtration system, there isn’t a lot of difference between pool filter sand used in above-ground sand filters and the sand used with in-ground sand filters.These sand filters can be used with grains of sand as small as 0.45 millimeters without pulling sand out of the filter. Above-ground pool filters will typically be smaller and the flow rate through them will also be lower because the pump doesn’t need to work as hard to pull the water into the filtration system.Pool filters can be used with both above-ground and in-ground pools, but differences in flow rates mean that there are some pool filter sand products that aren’t appropriate for all types. It won’t work well, and it can damage the filtration system. Never use industrial or play sand in a pool filter. With this in mind, the ideal grain size for filter pool water is between 0.45 millimeters and 0.55 millimeters or 0.018 inches to 0.022 inches. Grains that are too large won’t get pushed out of the filter, but they are also less effective at properly filtering small particles. If the grains are too small then the flow of water through the filter can actually sweep them up and push a large portion of the sand into the pool instead of cleaning the water. In order for a sand filter to work properly, it needs grains of sand that are the appropriate size. The grain size of pool filter sand can be measured in inches, but due to the size of the sand, it’s easier to express it in millimeters. This is because while algae is often 30 microns in size, algae spores can be much smaller, allowing them to slip through silica sand and create new problems in the pool. This alternative to silica sand is made from recycled glass and can capture debris as small as 3 to 5 microns in size, making it a good option for pools that have recurring algae problems. Glass pool filter sand is the best option for removing very small particles from the pool water.However, zeolite sand is also capable of binding with chloramines to help maintain the chlorine balance in the pool water. Zeolite pool filter sand is made from volcanic rock minerals and can filter debris as small as 10 microns, giving it a slight edge over silica pool filter sand. Silica sand is made with ground quartz, and it has rough edges to help trap particulates. It’s inexpensive, easy to find, and can filter particles down to 20 microns, which is approximately 0.0008 inches.
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