Why Remineralizing RO Water is Necessary
Reverse osmosis (RO) is a powerful filtration method that removes up to 99% of contaminants, including heavy metals, chemicals, and dissolved solids. However, this intensive process also strips out essential, health-supporting minerals like calcium, magnesium, and potassium. While you get clean, pure water, it's also left with a flat taste and a slightly acidic pH. Remineralization is the process of reintroducing these beneficial compounds to improve the water's flavor, restore a balanced pH, and support bodily functions that rely on these electrolytes. Many people underestimate the role of water-based minerals in their overall health, making this a crucial step for long-term RO water consumption.
The Correct Ratio: How Much Salt to Add?
The amount of salt needed is minimal, so precision is key to avoid a salty taste and potential health issues. For general-purpose remineralization and hydration, a common and safe guideline is to add approximately 1/4 teaspoon of mineral-rich salt per gallon (about 3.8 liters) of RO water. If treating individual glasses, a tiny pinch is sufficient. It is crucial to use a measuring spoon for larger batches to ensure consistency. A Total Dissolved Solids (TDS) meter can provide more accurate feedback, with many experts recommending a target TDS of 50–150 ppm for optimal taste and mineral balance.
Choosing the Right Type of Salt
Not all salts are created equal for remineralizing water. Standard table salt should be avoided as it provides only sodium and often contains anti-caking agents. The goal is to reintroduce a broad spectrum of trace minerals. Here are the best options:
- Himalayan Pink Salt: Sourced from ancient sea salt deposits, this option contains up to 84 trace minerals, including potassium, calcium, and magnesium. It's widely available and dissolves easily.
- Celtic Sea Salt: Harvested from seawater and unrefined, Celtic sea salt contains a robust profile of natural minerals and has a reputation for high quality.
- Concentrated Mineral Drops: These are liquid electrolyte blends formulated specifically for remineralization, offering a more complete and balanced mineral profile than salt alone. They offer precise dosing control but can be more expensive.
A Step-by-Step DIY Remineralization Guide
Follow these simple steps to remineralize your RO water at home:
- Gather Your Supplies: You will need your RO water, a measuring spoon (for larger batches) or a clean shaker (for a pinch), and your chosen mineral salt (Himalayan or Celtic). A TDS meter is optional but recommended for precision.
- Measure the Salt: For a 1-gallon batch, measure out 1/4 teaspoon of fine-ground Himalayan or Celtic sea salt. For a single glass, use just a couple of grains—the equivalent of a pinch.
- Add to Water: Pour the measured salt into your container of RO water. For larger batches in a pitcher or jug, stir thoroughly to ensure the salt dissolves completely. For a glass, a quick stir will suffice.
- Taste and Adjust: Take a small sip of the remineralized water. It should not taste salty. If it does, you have added too much. For future batches, you can start with a slightly smaller amount. If using a TDS meter, check the reading to confirm it is within the desired range (50–150 ppm).
- Store and Enjoy: Store the remineralized water in a clean, airtight container. The remineralization process is instantaneous, so the water is ready to drink immediately.
Comparison of Remineralization Methods
| Method | Minerals Added | Ease of Use | Cost | Precision | Best For |
|---|---|---|---|---|---|
| Mineral Salt (DIY) | Broad trace minerals (mostly Na, Mg) | Easy | Very Low | Low (by taste) | Budget-conscious, occasional use |
| Mineral Drops | Balanced mix of essential minerals | Easy | Moderate | High (measured) | Travel, portability, precision |
| Inline Filter | Balanced mix of essential minerals | Automated | High (initial) | High (consistent) | Whole-house solution, convenience |
| Spring Water Blend | Natural minerals | Easy | High (ongoing) | Medium (variable) | Naturalists, taste preference |
Advanced Considerations for Remineralization
While adding mineral-rich salt is a straightforward method, a few more advanced points can be considered for those seeking more control or different mineral profiles. For instance, creating a precise mineral blend using food-grade powders like calcium carbonate and magnesium sulfate is possible, but this requires more expertise and accurate measuring tools. Another approach is installing a dedicated inline remineralization filter to an existing RO system. These filters automatically add minerals back to the water as it passes through, providing a consistent and hands-free solution that benefits all water used from that system. This is often considered the most convenient method for long-term household use.
Conclusion
Understanding how much salt to remineralize RO water is a simple and effective way to improve the quality of your drinking water. By using a small, measured amount of mineral-rich salt like Himalayan pink salt, you can restore lost electrolytes, enhance flavor, and support better hydration. While DIY salt addition is a very cost-effective starting point, other methods like mineral drops or inline filters offer different levels of convenience and precision. The key is moderation: start with a tiny amount and adjust to taste, ensuring your remineralized water is both healthy and refreshing without becoming salty. Consistent remineralization ensures you reap the full benefits of pure, filtered water while maintaining a crucial mineral balance.
Visit the Aquasana Website for more information on the process of remineralization.
