That's a lot to water. Out of curiosity, why not go with a hydro setup? Seems like it would be a lot less maintenance. If I can find a place with a walk in closet (apparently these are hard to come by around here) then ill be going with a setup similar to your, but ill be goin hydro.
What size room is that in? Also, what sort of lighting are you using?
Looks pretty nice, +rep