If you were to go with 18 individual rez sites. Your looking at an hour or two of just checking ph. Talk about a headache.

You can build your own DWC tub fit for eighteen 3" net pots. 15 - 30 gal tub. 10 12" airstones and a good air pump and there you go. Sounds easy right? In a small space with enough light you can get up to 2 - 3 oz each plant. Depending on your overall knowlege and experience. Good luck and keep us informed on what you decide.

SNTXT