Silica Gel, It Talks
It TALKS? What do you mean it talks?
Yeah well - kind of... There are two types of silica gel that either fit this description or not. Indicating silica gel starts out as one color such as deep cobalt blue or yellow. When the product begins to adsorb moisture, Blue, for example will turn pink and yellow silica gel will turn green. This lets you know it's time to replace or regenerate the product.