DiY NET POTS, MEDIUM

[Indosmoke]

Is there a way of making you're own diy NET POTS, I have heard that
You can use gravel or rocks from the ground as the medium, but haven't seen
Anything regarding NET POTS, I guess online or hydroponic shops are the only
Way

[tlranger]

Used washed river gravel, nice white, clean, no break down. Three gallons is pretty heavy. Landscaping store, one dump in the pickup. Still see in the driveway. Net pots for tube system seemed pretty cheap.