Why is there sand granules in the bottom of your salt water pool?

Sand granules in the bottom of a saltwater pool are often a consequence of improper pool maintenance and an imbalance in water chemistry. Here are a few reasons why you might find sand granules in your pool:

1. Improper Filter Maintenance: If the pool filter is not cleaned regularly or is damaged, it may allow small particles, including sand, to pass through and accumulate at the bottom of the pool.

2. High Filter Pressure: If the filter pressure is too high, it can cause the filter media (such as sand or DE) to break down and release sand granules into the pool water.

3. Pool Scale Formation: Scale buildup, which is caused by an imbalance in calcium hardness and alkalinity levels, can lead to the formation of hard deposits on the pool surfaces, including the pool bottom. This scale can break down over time and form sand-like granules.

4. Inadequate Circulation: Poor pool circulation can result in stagnant water, especially in areas where the pool water does not flow sufficiently. This can lead to the settling of small particles, including sand granules, at the bottom of the pool.

5. Natural Debris: In some cases, natural debris such as small leaves, pollen, or dirt can get into the pool and settle at the bottom. This debris can sometimes appear similar to sand granules.

To address sand granules in a saltwater pool, it's important to properly maintain the pool and balance the water chemistry. This includes regular filter maintenance, ensuring proper filter pressure, controlling calcium hardness and alkalinity levels to prevent scale formation, and ensuring good pool circulation. Additionally, it's recommended to vacuum the pool regularly to remove any settled debris. If you're unable to resolve the issue, it may be advisable to consult with a pool professional for assistance.