While some prefer to use sand for pool filters to reduce debris, particles, and cloudiness, these systems have some drawbacks. One of the main things that users will want to consider is that sand can tend to clump or provide uneven backwashing if not used correctly.  Backwashing pools with sand filters also takes longer, requires more hands-on pool maintenance than cartridge filters, and reduces the amount of pool water. Finally, some pool filter sands lack the filter efficiency of cartridge filters.