Can baking soda be used instead of ash in a salt water pool?

Baking soda (sodium bicarbonate) can be used as an alternative to ash (sodium carbonate) in salt water pools. However, it's important to keep in mind that baking soda and ash have different chemical properties and may affect the pool water chemistry differently.

Adjustments to pH and Alkalinity:

Baking soda primarily raises the pH and total alkalinity levels in pool water. On the other hand, ash raises both pH and alkalinity, but it has a stronger impact on alkalinity. When using baking soda instead of ash, you might need to adjust the pH and alkalinity levels more frequently to maintain the ideal pool water balance.

Buffering Capacity:

Ash has a higher buffering capacity compared to baking soda. This means that ash can resist changes in pH more effectively, keeping the water chemistry more stable. Baking soda, while also a buffer, has a lower capacity, so the pH may fluctuate more easily.

Scaling:

Baking soda can potentially contribute to scaling or mineral deposits on pool surfaces and equipment if the calcium hardness is high. Ash, on the other hand, does not cause scaling as it contains carbonate ions that help prevent calcium precipitation.

Corrosion:

Both baking soda and ash are considered less corrosive to metal surfaces compared to other chemicals used in pools. However, excessive levels of either substance may still cause corrosion over time, especially if the pool is not properly maintained.

Flocculation and Clarification:

Baking soda does not have a significant impact on flocculation and clarification processes in the pool. Ash, however, can aid in the removal of small particles by promoting flocculation, leading to clearer water.

Cost and Availability:

Baking soda is generally more cost-effective and readily available compared to ash.

It's recommended to consult with a pool professional or water chemistry expert before making any changes to your salt water pool chemical routine, as they can assess your specific pool's needs and recommend the most suitable alternatives and adjustments.