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Calcium lumps in a pool are calcium deposits that form when a pool's water parameters are not in the normal range. They can float around on the surface of the pool water, making it look and feel dirty. The most common causes of calcium lumps in pools are calcium hardness above 1,000 ppm, alkalinity over 120, and a pH over 7.8. Keeping your pool’s calcium levels, alkalinity, and pH levels within the normal, safe ranges is the best way to prevent calcium lumps and other problems, including damage to the pool surface.

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.

Yes, adding a pool to your property will almost always increase your homeowners insurance premiums. This is because pools are considered a greater liability due to their potentially hazardous nature, and the added replacement cost of the pool is factored into your home's rebuilding cost when considering coverage limits. The amount of the increase can range from as little as $50 to a few hundred dollars more per year, depending on your insurance provider, location, current coverage, and the safety features installed. Before building a pool, it is highly recommended to contact your insurance agent to get an estimate, discuss their specific guidelines and requirements, and factor the increased premium into your total pool installation costs.

It's not a good idea to drain an aboveground pool into your yard since the pool water's chemicals can harm your plants and the surrounding ecosystem. Instead, it's best to drain the pool into an appropriate sewer so it can be processed at a water treatment plant. You might also be able to drain it into your storm drain, depending on your region. Check with your city to learn about any relevant regulations.