NFT, Timing, Oxygen, 12V and NFT problems
Hi, please advise me about your NFT channels . I want to grow larger plants so the widest channel would be my choice but I am not sure of the spacing. I would order an extra top to modify the spacing myself.
The watering times you give are odd as all I have read says to run continuously. Could you perhaps give me more information about this.
I am experienced with Run to waste and want to change my system and my grow room is 1.5 x2.5
I am not interested in sea of green or scrog but larger non bushy plants.
Please can you supply 12v water pumps for nft or do you have a fail safe system to cope with power failures.
- 150mm x70mm channel and lid is $27 per meter
- Lid only is $10 per meter
- 225mm x 70mm channel and lid is $34 per meter
- Lid only is $12 per meter
- Most of the commercial growers in Queensland use timing to increase air around the roots, and complete drainage.
- 15 minute break is not enough time for roots to dry out but roots can drain and get more airation.
- Running continuously is fine if the water is below 25 degrees and can therefore hold water.
- Above 25 degrees the water won’t hold much oxygen and allowing temporary drainage for say 15minutes is the easiest way to get air into it.
- If there is a chance of root drying out, say because it is so hot, either drain for a shorter period or keep running through a hot period/ hot part of the day.
- NFT was designed for HEATING plants in England. It is a problem keeping the temperature down for Australia. Commercial growers often have 45+ degrees – and big root problems if they do.
- 12V is a good idea, but the lower wattage and DC design usually results in higher failures.
- The Aqua One is 240V and do not fail but are at the mercy of power supply.
- Perhaps get a UPS (Uninterrupable power supply ($90?)) designed for a computer. That could solve the issue if you are worried about power.
- Inside, if power cuts out so do lights, so plants don’t get too problematic if its 15mins to 45 mins. Several hours or Overnight could be an issue with plants taking a day to bounce back… Its never been a big enough issue for us in SE QLD to fix it.
- NFT is a very unpopular system here, with 99% of growers using media based system due to
- NFT being a lot more work and
- often more risky than other systems.
- My NFT here has been working fine for winter and spring. But from Last Thursday to Monday was all it took for rot to set in. Today I am putting in products to treat it, adjusting timing and I have even thrown about 20% of the plants out. It wasn’t anything I did differently, however, checking the roots and keeping them white is the key to NFT results. You can’t set and forget it.
I hope that helps.
Hydrocentre Pty Ltd Also Trading as Nerang Hydroponic Centre
4/50 Spencer Road Nerang QLD 4211
Phone 07 5527 4155 firstname.lastname@example.org
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