Originally Posted by
Farmer Geddon
Your plants are all green. To me, that means that the ec/pH and brand of nutes is fine. The plants wouldn't be all green otherwise so no advantage to changing your nute regime.
Some ideas off the top of my head which may or may not apply to your situation:
If the airline to each plant is on a spur rather than a ring, it is possible that some plants get more air than others. Similar with water flow. When water flows from A to B, there is no guarantee that it touches everything between A and B with an equal amount of flow. If the main res is heated, then the first plant gets more warmth and the last plant not so much.
All systems have their hassles and with dwc, those hassles are paid for up front. Plain sailing after that though. Getting dwc fully dialled in by the 2nd grow is a big ask imo. The more efficient the system, the bigger the impact small details can make. I'd recommend keeping it plain vanilla at first, ie. no additives or supplements until you are confident the next grow will be all green and problem free, Then additives/supplements can be tried one at a time.
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