I have a large pecan tree over my pool. In the fall when sap starts to out of pool turns green. What do prevent this every fall?

1. Remove the source of the sap. This means removing the pecan tree, or at least pruning the branches that overhang the pool. If you can't remove the tree, you can try to cover it with a tarp during the fall months to prevent the sap from dripping into the pool.

2. Clean your pool regularly. This will help to remove any sap that has already gotten into the pool, and will prevent it from building up and causing the water to turn green. You should vacuum the pool at least once a week, and brush the sides and bottom of the pool as needed.

3. Use a pool cover. A pool cover will help to keep the sap out of the pool, and will also help to prevent evaporation and heat loss.

4. Add a chemical algaecide to your pool. This will help to kill any algae that may start to grow in the pool, which can also turn the water green.

5. Adjust the pH level of your pool water. The ideal pH level for pool water is between 7.2 and 7.8. If the pH level is too low, it can cause the pool water to become acidic and corrosive, which can damage the pool liner and equipment. If the pH level is too high, it can cause the pool water to become cloudy and scaley, which can also make it difficult to see.

6. Shock your pool. Shocking your pool is a process of adding a high dose of chlorine to the pool water. This will help to kill any bacteria or other microorganisms that may be in the pool, and will also help to clear up any cloudy or green water.

By following these tips, you can help to prevent your pool from turning green due to pecan tree sap.