Yeah the caps are cheap and from a local hydro store. The feed tube is attached to a small dripper stake and inserted into the net pot filled with hydroton where the stream of water is aimed to flow from the middle area of the pot over the rocks. Then I put the white cap over the top to shield light.
I'm kind of cheap at the moment with the white tape keeping the tubes in place and all. I can assure you though the tape is on there good. It has a really tacky adhesive that bonds to plastic very well. I'm going to cover the whole pvc pipe system on top with the white plastic roll soon to make it look a little better

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40 site commercial grow *Anything I post should be considered hypothetical. All of the pics i post are off the net. I do not condone illegal activities.*