Another common concern is the state of the brine itself. A good sign to say that your veggies are culturing well is cloudy brine and sediments at the bottom of the jar. Foaming or bubbling brine is also fine since different vegetables react in different ways. Vegetables that have a higher sugar level tend to foam more. This effect will disappear after a few days. There also are vegetables that do not foam a
lot. Bubbles will form when carbon dioxide gas is released during the process of fermentation, so that is not something that you should be concerned with. Everything is fine if the ferment smells and tastes pleasant.
You may notice some vegetables changing color in your ferments. This is completely normal as darker colored vegetables can easily turn the color of lighter colored vegetables. This is especially noticeable if you use beet or purple cabbage. However, if lighter colored vegetables turn dark in the absence of darker colored vegetables, this is a sign of caution as there is a high chalice that the jar has become contaminated. The color of vegetables can fade if it is exposed to sunlight. This is not a sign for high caution as long as it tastes okay. Slimy vegetables should also be looked out for and discarding them is recommended.