About This It is a plant moisture meter that can be used by simply inserting it into the pot without the need for batteries When there is enough water, the indicator turns blue, and when the water becomes insufficient, the blue color changes to white Recommended for home gardens and multi-pot users A cool impression with black Match the pot and room atmosphere The core material inside is 100% natural fiber and will decompose due to bacteria in the soil The estimated life of the core is about 6 - 9 months in organic soil, 9 - 12 months in inorganic soil, and 1 - 2 years in hydroculture, water moss, and bark When the core reaches the end of its life, it can be replaced with a separately sold refill A gift for plant lovers, or as a teaching material for gardening classes Bulk purchases reduce costs and are convenient for managing all at once