How can you support plants in a bubbleponics system. 3" net pots in the lid of an 18gal rubbermaid. Plants 3-4' tall cause the, use to be snug, net pots to floppy around like a fish out of water. Plants could be tied from the walls or ceilings for support or a stick could be ran through the holes in the net pots to the bottom of the bucket and the plants supported that way, but much rather prefer to support the pots from moving. How can this be accomplished. HELP...