Bignutes
Well-Known Member
In your system, is there an overfill hole, or do you carefully maintain water level? Air pressure must equalize through the soil if no hole? I can see how this would work with holes only in the bottom of a wick. Is your wick bigger in diameter than those we typically see here?
I never thought much about an air gap, but I definitely don't want the water level at the bottom of my soil (I'm afraid it would get oversaturated). I left a good gap in case of sag (I don't use a wick, so no spacers--just the gravel of a wicking bed in my reservoir). This must be what you mean by "byproduct."
The wick I run is about 10% of pot size, the roots are contained by the pot and wick, this prevents the roots from reaching an air gap