Yes, you can add water to your kimchi if there isn't enough brine, but it's best to use a salt water solution to avoid diluting the flavor and affecting fermentation. A ratio of 1 teaspoon of salt per cup of water is generally recommended.
Kimchi relies on a salty brine for proper fermentation and preservation. If your kimchi doesn't have enough liquid, the vegetables on top may dry out and become susceptible to mold. Simply adding plain water can dilute the existing brine, potentially slowing down or inhibiting fermentation and affecting the overall flavor profile.
To safely add liquid, create a salt water solution. Here's how:
By using a salt water solution, you maintain the proper salinity needed for fermentation and prevent unwanted bacterial growth.
To prevent needing to add water later, thoroughly salt your cabbage during the initial preparation stage. A good salting ensures that the cabbage releases enough liquid to create its own brine during fermentation.