The AutoPot 4 Pot XL System is extremely versatile and can be used for a wide range of plant types and sizes. Seasonal flowering plants and perennial shrubs thrive and produce an abundance of blooms and foliage because of the unique action of the AQUAvalve, which is designed to allow the plant to go through a wet & dry cycle. The AutoPot 4 Pot XL System is easily extended so many pots can be linked to a single tank. Please see examples of typical layouts using 6mm pipe or 16mm pipe. The pots & trays can be easily moved at will, if the plants grow too large they can be spaced further apart with ease. Once set up and a tank is filled with water & liquid feed this extremely versatile system will completely take care of all your plants needs. All you need to do is remember to fill up your tank from time to time. Each AutoPot 4 Pot XL System contains: 4x 6.6 gallon pots, 4x 1Pot XL tray & lid, 1x 12 gallon reservoir, lid & 3/8” top hat grommet, 1x 3/8” filter, 2x 3/8” cross connector, 4x 3/8” tee connector, 2x 3/8” inline tap, 4x AQUAvalve5, 1x 13″ length of 3/8” pipe and 4x Root Control Disc (round).