There are several problems to grow cannabis with this system:

• First of all, there is no support system for big plants. You will have to use some sort of support. Tomatoes hooks work.

• The second is that there are too many plants on a small tube. The root system of cannabis is similar to tomato (but tomato is a perennial plant). Eventually you will limit the size of the plant. I did not understand if the intended project was for NFT, EBB or DWC, but there are other setups for cannabis.

• Another major problem is light. There are phases for growing and flowering. There is not an effective and easy method of doing light on that setup.

You can read about growing canabbis with hydroponics in several sites and if are ever in Uruguay, I can show you a Cannabidiol farm

I do not know if your question was a joke, but hydroponics is a serious and effective growing technic well suited to all plants. Just have to study the plant and use your brain to build something that works best for you plant.

PS: EcoMotive, your setup looks amazing. Use some arduinos as IoT sensors, you will have a lot of fun with it.

Cheers.