How to use: as the soil dries, the ceramic cone delivers water gradually into the surrounding earth; Thereby create a vacuum within the cone which draws water from the nearby container of water; Once the soil is moistened enough, the watering stake will cease flowing water; Note: close cap with full water in stakes, formation of a vacuum in stakes Useful tools: the self watering probes are simple and effective ways to water your plants when you are on vacation, business trip or forgetting to water them Application: the 12 pack watering stakes are suitable for most automatic garden watering devices; They are good for seeding, planting without pollution; And they will slow to release water into the pot as the plants need Measurement: connect tube is 78 cm/ 30.7 inches in length, the root get water directly by itself to achieve water drip irrigation Kindly reminder: the watering stakes are suitable for watering any indoor plant; Please keep the sink and flower pot at the same level; And the sink is at higher level, which will accelerate the process of drip irrigation