D9 are your plants sitting on something to raise them a bit above the level of the bottom of the res? I'm wondering if this is needed to drain out the water from the buckets after the pulse or does it all just flow back and stabilize?
Do you use the same lines when flowering is done or get new garden hose?
My test ppk is doing really amazing and so far I've transplanted about 8 plants from soil into an interim wick ppk setup till I get the main ppk going.
I found some rectangular containers from uline that I think will work well. Basically the same size as the tuff tubs but they might be better for spacing for my setup.
they are just stuck in a finger hole to the bottom then i pull them back up about 1/2".
there is no need to further drain as in a ppk there should be no standing water in the medium after a pulse.
the water is removed by capillary siphon.
i intend to use these lines indefinitely. it took a year for a .170 id drip tube to clog.