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Hi there BPP best regards to you - great column and i am looking forward to building one of these as my next experiment.
I currently favour NFT.
One question so far regarding the DWC bubbler method.
The airpump provides oxygen to the solution and serves no other purpose - correct?
If this is the case - how does the plant remain watered? - is the net cup suspended IN the water with the grow rock / rockwool soaking up nutes through cappiliary action?
If so - this would mean that during the initial stages the water level must be kept very high in the bucket whilst the plant develops a root system.
Is my thinking right???
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