So i'm switching my setup from Aero/NFT to a RDWC-Undercurrent type setup to reduce complexity & maintenance tasks. I've got my buckets (9, in 3 rows of 3) & they've been drilled & fitted with 1" PVC bulkheads, but not connected to each other and this is where I needed a little design advice. Originally I had planned on having the 1/4Hp sump/utility style pump dumping into the 1st bucket in each row of 3. #1 dumps into #2, #2 dumps into #3 & #3 has a return line that runs back to the reservoir (ie. a serial setup). Being relatively new to DWC i was wondering how much of a concern is port blockage? Is this a valid concern or does it typically not happen? Would I be better off having the pump run into a manifold so each bucket has its own in-port, and each has its own out-port dumping to a larger return tube? My concern w the first setup (buckets connected in a serial arrangement) is that if one of the ports got blocked there could be a potential overflow situation, where in the 2nd setup (buckets connected in parallel) if 1 bucket had blockage, its input would be split amongst the other buckets therefor giving more tolerance to blockage. Anyone have any experience with this? Looking at the undercurrent systems got me thinking about this. The UC setup looks pretty tollerant due to the large diameter pipe size & the way that the pump is "pulling" instead of "pushing".