Mr. Numspa practiced Aeroponic Techniques for over a year with various changes to this system. We have a very basic but hi-tech system that is pretty difficult to dial in if you have never payed attention to PH and PPM levels in your nutrient solution. Mr. Numspa directed to use a large as possible reservoir (within reasonable limits) to the system as when the plants start thriving, they will create significant changes in the nutrient solution which will cause nutrient lockup or high and low PH swings. He states that a tri-meter that constantly monitors the PH, PPM (or EC), and Temperature so that you can see the levels at a glance. He also states that the back of the rails where it drops down into the reservoir is the biggest risk to the system. Over time the roots will start to hang and then just sit in the reservoir. This also allows bugs to enter the rail so he suggested using a mesh that would prevent things from entering the rail but to make sure that it will not react to salt bearing nutrients. The use of beneficial bacterias such as Great White Mycorrhizae or others with similar bacteria diversity. Growth rates in this system are incredible when optimized and has little room for error when it comes to the reservoir. Plants grown in this system have high resilience to cutting, harsh training, root pruning, but most other attacks on the plant will take like a soil based one so be careful.