How does it work?

The equipment consists of long shallow trays which feature a long lid keeping the machine enclosed. You can find cut outs in the lid which is where the plants are placed. The plant sits in a plastic pot with slits to allow the roots to cultivate through them. They seem like an inferior version of the inner pot utilized in flood and drain systems.

The trays are put above a water tank and a pump connected at one end to pump water into the trays. There must be a good gradient in the trays so your water flows down the tray and back into the water tank. Typically the gradients used are 1:30 or 1:40 this stops water pooling in the depressions brought on by uneven surfaces and roots. The concept is that the roots of the plants are continuously bathed in a nutrient rich water supply and produce healthy, linear growing plants.

The name nutrient film is in mention of the thin film of roots that’ll eventually form on the bottom of the tray. It needs to be always a very shallow stream of water with only the root of the roots submerged; this enables the rest of the root to be open to the air and get the necessary oxygen needed for growth.

The systems come in different lengths which can take different variety of plants. Essentially you can have any period of NFT system, nevertheless the longer the machine the more chance that flow might be interrupted. Systems longer than 12 metres tend to obtain less growth in plants towards the conclusion due to the nutrients in the water being taken up by the plants nearer to the reservoir. However this dilemma could be overcome by creating another water supply along along the channel.

Pump Breakdown 世博娛樂

As NFT systems only demand a small, shallow water delivery the pumps used are not very powerful. They are also on all of times meaning that they get lots of action over the length of the grow. This in conjunction with possible salt precipitation from the dissolved nutrients (especially in hard water areas) implies that sooner or later the pump probably will break down. If you’re able to catch this quickly then aside from the expense of a brand new pump, there’s no real problem to the plants. However if this goes unnoticed it indicates that the roots will dry out very quickly and this can affect growth.


The plant roots are constantly submerged in water and this can result in bacterial infections such as pythuim. Pythuim is way better called root rot and can decimate your crops when it is not detected early. You can find products in the marketplace that may eradicate this if you should be unlucky enough to obtain it, but the simplest way is prevention. This is often achieved by changing the water reservoir periodically and adding preventative additives to the nutrient solution.


Heavy fruit yielding plants may become unstable in a NFT system. This really is due to the roots growing long and flat and not having any a lot of purchase. This causes the plant to become top heavy and they fall from the trays – not ideal! This is often overcome by supporting the plants by using yo-yos, string or canes. This may give some stability to the plant and let it continue growing and bearing fruit without toppling over.

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