When it comes to storing reverse osmosis (RO) water for long-term use, there are a few important factors to consider. Here, I will provide you with a detailed answer based on my experience as a sommelier and brewer.
1. Container Selection:
First and foremost, choose a container that is tightly sealed and made of a food-grade material such as glass or high-density polyethylene (HDPE). This will help prevent any contaminants from entering the water and ensure its purity over time. Avoid using containers made of materials that may leach harmful substances into the water.
2. Cleanliness:
Before storing RO water, make sure the container is thoroughly cleaned and sanitized. Any residue or impurities left in the container can affect the quality and taste of the water. I recommend washing the container with hot, soapy water and rinsing it well before use. If you want to go the extra mile, you can also sanitize the container with a solution of one part bleach to nine parts water, followed by a thorough rinse.
3. Storage Environment:
The storage environment plays a crucial role in maintaining the quality of RO water. Ideally, you should store the water in a cool, dark place away from direct sunlight and sources of heat. Exposure to sunlight and high temperatures can degrade the water quality and potentially promote the growth of bacteria or algae.
4. Avoiding Contamination:
To prevent contamination, it's important to handle the water and the container with clean hands and utensils. Avoid touching the inside of the container or the water with your hands directly. Instead, use a clean ladle or a funnel to pour the water into and out of the container. This will minimize the introduction of any bacteria or other contaminants.
5. Monitoring and Rotation:
While RO water can be stored for an extended period, it's a good practice to periodically check the water for any signs of spoilage or contamination. Inspect the water for any unusual smells, discoloration, or growth of slimy substances. If any of these signs are present, it's best to discard the water and clean the container thoroughly before refilling.
6. Additional Considerations:
If you plan to store RO water for an extended period, you may want to consider adding a small amount of alkalinity to the water to help maintain its stability. Personally, I have found that adding a handful of boiled coral sand to the container can provide a slight boost in alkalinity. However, this is optional and should be done with caution, as excessive alkalinity can affect the water's taste.
To summarize, storing RO water long-term involves selecting a suitable container, ensuring cleanliness, maintaining a proper storage environment, avoiding contamination, and periodically monitoring the water for any signs of spoilage. By following these guidelines, you can store RO water for an extended period while preserving its quality and purity.