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Details Gro-Tank GT424 NFT Kit Product Details: The Gro-Tank GT424 NFT Kit is the second smallest system in the GT range and is suitable for 2 to 6 plants and a 400 or 600 watt light. The GT424 is an all in one hydroponic system that comes complete with: 40 Litre tank NFT top-tray Corriboard top-plate MC320 water pump and fittings Spreader Mat PHdown PH test kit The Gro Tank 424 NFT systems are self-contained kits containing everything you’ll need to get going. NFT is one of the easiest and purest hydroponic techniques, that requires very little maintenance and a minimum of growing media. If you’ve never tried NFT you will be amazed at the difference with this system, plants grow at incredible rates and are very green and healthy.