Having problems over watering, under watering, water logged roots, rapid moisture change, uneven watering? We have the solution for you… the Adjustable Water Reservoir converts your regular pot into a self-watering container, keeping your plants from drying out and reducing the time you spend watering. Retractable wings on the reservoir automatically adjust to fit pots between 16” and 20” in diameter. Also included are three (3) 650g bricks of coir. Coir is a 100% organic granular by-product that remains after extracting the long fiver from coconut husks. When using coir as a soil amendment, your plants require less fertilizers, develop more elaborate and stronger root systems, and are more resilient to disease, pathogens and weeds