Multiflows are an excellent hydroponics system using the principles of ebb & flood and also can be almost a bubbler pot, if you add enough aeration with some reilable Rena Airpumps, and Airstones in your 9L growing pots. They need a level floor to start with, but beyond that, they allow you, the grower, to tailor make your system up to fit any awkward room dimensions. The massive growth rates are a result of massive supplies of oxygen to the roots and great delivery of nutrient solution to the plants. They are run by a Controller, which is fixed on the exterior of a 25 litre container, and is supplied in turn by an even Larger Reservoir, appropriate for the size of system. Always use the Drainage Stands- they aid draining the 9L pots more effectively and make the Multi-flow the best system of its type. The BigShop also supply a range of Multiflow Accessories to extend, replace or repair your system.