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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’ll need at least 50-by-10 feet for a residential lap pool. Endless pools need as little as 15-by-8 feet. Deciding which type of pool is right for you and your family will depend heavily on the size of your backyard and what can comfortably fit. Don’t forget to leave room for other structures and activities in your yard, such as a swing set, shed, garden, or outdoor grill.

Yes, adding a pool to your property will almost always increase your homeowners insurance premiums. This is because pools are considered hazardous, which increases your home's liability risk. The replacement cost of the pool itself is also factored into your home's rebuilding cost when determining coverage limits. The amount of the increase can vary from as little as $50 to several hundred dollars more per year, depending on your insurance company, location, current coverage, and installed safety features. It is best to contact your insurance agent before installing a pool to get an estimate, understand their specific guidelines, and factor the ongoing cost into your budget.

There are three types of pool filters—cartridge, sand, and D.E. (diatomaceous earth). Cartridge and sand filters are the most popular types and are affordable and easy to maintain. D.E. filters are more expensive and require more maintenance, but they are also very good at filtering out small particles.