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The GT205 is ideal for a first time NFT grower. It will do 1-3 plants. Dimensions are: Tank 69.5 x 38.5 x 18.5cm Tray Channel 56 x 34.5 x 5cm Volume 20 litres. This hydroponic system uses the principle of Nutrient Film Technique (NFT) to distribute water and food to your plants root systems. They are Re-Circulating as opposed to Run-to-Waste with an appropriate sized pump bringing liquids up from the Tank or Reservoir below to the Tray which rests with a lip in and on top of the Tank. The Tray is manufactured with a built in slight height drop from one end to the other and there is a grid pattern molded in the plastic. Liquid is evenly distributed at the high end of the Tray and it runs down the Tray through the roots of your plants and falls back into the Tank. Always using Spreader Matting with NFT helps to break up the surface tension of the liquids so that it runs evenly across the Tray and waters all the root zone area. A Correx cover is used to cover the root zone completely (you cut holes in the correx when planting out) so no light reaches the roots. The Gro-Tanks from The BigShop come complete with tank tray correx cover delivery system pump spreader mat pH Down 250ml and a test kit an emptying tube and assembly instructions.