Aqua Pothos Plus is a fully adjustable hang on back aquarium plant holder with 4 individual spaces to put your pothos or any other plant. As the plant roots grow down into the water they will do wonders in your aquarium by lowering the nitrate level resulting in fewer water changes and cleaner water. There is a removable front plate so you don't damage the roots when taking the plants in or out. Use the included adjustable leveling screw to level and secure the plant holder on any tank from rimless on up. 3D Printed with environmentally friendly non-toxic material.