What's wrong with my plant?

[GrapeApe]

How do I build Irish & Webby aero tubes?

The system described here is the product of an experiment ('speriment according to irish) to build an effective, inexpensive, high tech MJ machine. Irish and webfish are the primary proponents, though much of the hydroponic community has contributed in one way or another. SYSTEM ESSENTIALS The basic design is a series of 4" pvc (schedule 40) tubes that are sealed on one end and drain back into a central reservoir on the other. Plants are held in net pots set into the tubes. Each plant is fed b…