Well, I don't think I really know how many plants you have, and at what stage of their life they are, but you realize, the bigger they get the more juice they need.... I have left for 8 or 10 days at a time, and I put another reservoir tank either directly above or in a remote location at a higher elevation, then run a 1/2" tube to the original res, and put a float valve on it. This way when the original starts to empty, the float valve opens up and fills the original tank again.

KeyLime