tobh
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so what feeds those top black hoses? the pump in the reservoir? does this run 24/7? why?
then it gravity drains down to the reservior, so head pressure and heights are an issue here?
im scared of something leaking and making a total mess.
I have my pump set to run 15 min every two hours, off during lights out. You can run it 24/7 without issues too, and I may do so mid flowering, depending on how the plants look.
The reason for constant fertigation is it can encourage incredibly rapid growth. That's why UC works so effectively. I've heard guys talk about being able to literally watch the plants grow.
With gravity draining, you have to have a certain degree off level for the solution to return to the res effectively without pooling. Something minimal, like 3 degrees at least. Height can be an issue, but so long the drains are slightly above top level of the solution in the res, you can have the return lower on the res without dealing with the solution trying to equalize across the containers. That's why I designed this system to be ran outdoors. Bury the res in the ground, and the sites could sit on a short platform a few inches off the ground. Indoors, it complicated things.
I'm also nervous about leaks, but there are wifi flood alarms and other options available to prevent a huge mess as well as alert you to problems.