Not matting.

I grow in NFT but never done it without the spreader mat but read on forums where growers don't use it but its cheapas chips to buy
 
Don't need pics as OP says NFT and means spreader mat

There is a big difference between pipe/tube NFT systems and tray/table systems. In pipe/tube systems the roots are confined to a narrow space and mats are not needed. In the tray systems there is space for the roots to spread out wide - but they wont do it as well without the mat.
 
There is a big difference between pipe/tube NFT systems and tray/table systems. In pipe/tube systems the roots are confined to a narrow space and mats are not needed. In the tray systems there is space for the roots to spread out wide - but they wont do it as well without the mat.
The pipe/tube has matting?
 
The pipe/tube has matting?

It can. I saw a grower - I think in the EU - growing in like 12" square plastic pipe. He used mats with good effect. There is no reason why mats wouldnt work in smaller pipes/tubes, but they are not really needed unless they are BIG tubes.

The OP didnt provide ANY system details - which is why I asked the question to begin with. Plus, most people have no clue about how NFT is supposed to be done or why it works or doesnt work well.
 
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