You can shock your pool without running the filter system, but you must ensure proper circulation through brushing and the return jets. The filter doesn't need to be running, but water movement is essential for even chemical distribution.
Yes, pool filter sand is an excellent choice for most pools, providing effective filtration for particles down to 20-40 microns. It's cost-effective, long-lasting, and works well in sand filter systems with proper installation and maintenance.
Yes, you can vacuum a pool on recirculate, but it won't filter debris - it only circulates water back to the pool. This setting is useful for extremely dirty pools to avoid clogging your filter system.
You need DE (diatomaceous earth) in your pool filter only if you have a DE filter system. First diagnose your filter type, then follow proper DE application procedures for crystal-clear water.
