The reason for two thru hull adapters is that I'm following the diagram on post #477 on page 32 to create the loop. Sunny mentions putting a T at the res, so if I only run one thru hull, after my shut off valve I'll use a T. Then run the 8mm hose in a loop. Am I getting that part right? If that's the case I'll only get one extra thru hull adapter and gt two extra T's. My set up is a 10x5 flower room so that's at least 16-20ft of the 8mm. I'm just getting the extra 3mm to use 2-3ft per pot just so I can move them around easier if needed. I'm using 5 gallon smartpots in flower. One blumat per would be ok, right? Sustainable Village seems to have the patio kits for cheaper and I'm getting the extra 3mm hose from Green Acres.
D2G
I was going to suggest a T. No need for 2 thru hull adapters really. 1 Blumat per Smart pot is cool. It is better to have extra hose, you may need it in the future. My set ups are in tents, so I do not need much extra line. Green Acres was where I got all my stuff a long time ago...but they upped the prices big time on the Kit. But they offer all of the additional parts, which is cool. Good luck...you will love them.