I'm looking at your tower design and plan on incorporating it with a 5 gallon bucket on the back patio for lettuce. I have no doubt it will work. Probably just 2 towers per bucket.
I learned how to make the towers in this style from youtube videos uploaded by Petani kota87
Here is one video, he shows how to bend the pvc at time mark 6:35
I also found that using PVC with an inside diameter of the net cup looks the best. That way you can insert a small 1.5" piece of pvc in the hole to make it look very clean.
In that youtube video, it look like Kota uses a pvc with a 2" outside diameter, then just puts the cups in like that.
check out how heath Robinson (google) does his vert grows, he encapsulated an open bulb in like many many 7in clones , same idea but he used rockwool and sort of nft style. looks genius though. +rep
I'm looking at your tower design and plan on incorporating it with a 5 gallon bucket on the back patio for lettuce. I have no doubt it will work. Probably just 2 towers per bucket.
I was considering doing a modified 4 tower design where the center came into a 5 gallon bucket, which the pump then sat. It would just need a lot of silicone to seal it lol