You should always run your pool pump in freezing weather to keep the water moving. Doing so prevents the pool water from freezing and protects your pool from the damage that often comes along with frozen water. You should also run your pool pump when temperatures are approaching freezing, as a precaution. There’s no need to run a pool heater during the winter, as keeping water moving is generally enough to keep it from freezing.

The type of sand you need for your sand filter depends on the manufacturer’s instructions, but you’ll need to use sand specifically for pool filters. Silica sand is a wallet-friendly, common choice that’s relatively easy to replace. You’ll choose between various grades of sand and different-sized sand grains.

Size is the main difference between a pool and a spool. Spools are typically about half the size of an average pool, so they’re ideal for yards without the space for a full-sized pool. Spools are also easier to heat, so they tend to be a higher temperature than pools and can be adjusted to get as hot as a spa when it’s time for a relaxing soak. Spools also contain jets and blowers, while most pools do not.

A good rule of thumb is to add one or two 40-pound bags of salt for every inch of rain, but you’ll want to test your salt levels first to ensure you’re adding the right amount. Rainwater can dilute the salt levels in your pool, so after significant rainfall, test the levels and add the appropriate amount of salt to bring it back to the ideal level.