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Q.Hydroponic Question

Zone Sydney | Anonymous added on December 10, 2021 | Answered

I have a NFT system and in the bottom of the tubes there is a light brown dust like algae (??). When you move you hand over it it moves like dust. It is strange stuff but is now also attaching itself to the roots of my plants. I have researched online and think it is possibly Mustard Algae???? I use Oxy Plus to control algae growth but it has NIL effect on this light brown stuff.

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Certified GKH Gardening Expert
Answered on December 11, 2021

It could be biofilms or algae, both of which should be removed. Here is more:


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