Ermm.... head spinnin'.

I think you're missing... um... well,... let's take another route.

Forget the math... let's go with the "why".

The reason you're filling up the water level xx-inches below the netpot, is because you don't want to drown your roots...
So, you place your plants yy-inches into the hydroton/rockwool/choped-neutrons medium, and place that hovering OVER your water level... not touching.

Now, your air bubbles should rise to the top of the water line, and "pop".
When they "pop", they will "spray" the bottom of the netpot with small water dropplets... enough for wetting the medium... the plants growing, and dolphins singing.

So, it doesn't really matter if you're placing a plant 5 inches into the medium, then hovering above the water line...
Or if you're placing a small clone 0.5inches into the medium, then hovering...

It's the pops I tell ya'... the pops

Please let us know if this helped anything at all, or just made matters worse. We appreciate your feedback.
turtle420 Reviewed by turtle420 on . Water Level in DWC? I have read many places that when the roots have not grown through the netpot you want to keep the water level 1/2" above the bottom of the netpot, and when they have grown through, keep the water level 1/2"-1" below the bottom of the netpot. Now, I never see with these figures how far into the netpot you are putting the plant...Do you put 1" of hydroton in the netpot, the plant on top, and then surround with hydroton? Or is that plant resting on a larger layer of hydroton? Basically I guess Rating: 5