Wow, subbed for sure - are one of those pumps feed and one a return, or does gravity handle the return for you?
And what exactly do you attach the twisty ties to - I made my own little octagon thingy and haven't figured out yet how to build a screen for it.
Seeing as how we seem to run very similar setups, would love to stay in touch - here's a short vid (return pumps have since been replaced with a matching 1/6HP pump) - mine's lit with 4 600s and a vertitube from Octagon Hydroponics.
90 4" PVC wyes, 15 sided.
Longtime gardener (relatively speaking) but first time vertical grower, so look for any pointers I can get.
Thanks for taking the time to post this, much appreciated - BTW, have a journal at another site I keep much more updated than this site if you're interested in bouncing ideas off of each other.
http://www.youtube.com/watch?v=oLsQGDcTevs
EDIT: looked harder at the pics and saw the screens - what are they and how did you make them, if you don't mind me asking.
Also, you gave a lot of measurements in the first post but I'm still unsure as to the actual dimensions of your octagon(s) - what kind of diameter are you working with? Mine is 7' from edge to edge (outside diameter), but 5.5' from wye tip to wye tip (inside or "working" diameter). Just curious how yours stacks up in terms of size.
Sorry to hear about your plants dying - really that quick from a pump going out? Would've thought you'd have at least a 24 hour window to save them, sucks bro.