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You see the system , PVC tubes filled with coco substrate, i have 2 600w (cooltube) and they shine 9 hour each (18/6), temperature is 22 - 28 °C , moisture is ok. Now half of the plants have yellow leafs like you see on the picture. Is this lack of water , fertilizer or maybe oxygen in tubes...

Will PVC tubes (covered with glass wool) make eny effect on water temperature inside? (System 4200W 3.5m tall) or this is no worth cent and i should use ordinary pvc tubes ? If i have right the glass wool absorb some heat.

Hello everyone I am here to introduce my product AERO360°. This was the first picture of idea. Now look closer and you will see how much flexible is the system AERO360°. STRUCTURE : Its made from 3 towers and you can reduce highs just like skyscraper. If plant rise too close to...