I'm no expert, but isn't 7-9 days in standing water a near-death experience? I'm pretty sure that if the roots don't get air, they start to rot.
I'd probably try to raise the lights (heat) and cut back on the fans, (blow dryer) then water well as you are heading out the door. This, along with the wick method of drip watering:
5 gal bucket full of ph'd water, set on flat surface, preferably above the height of the pots you want watered...then using thick cotton string or clothesline, weigh one end of string in the bottom of the bucket with big rock or brick. Pull string fairly, but not too taught and weigh the end down in the pot with a brick or big rock. (looks like a zip-line from top edge of bucket, down into the pot.) The thicker the string, the faster it will flow, thus run-out. Each plant gets it's own string(s). Good luck either way.

But that's just me.

P.S. hurry back, lol.
Rusty Trichome Reviewed by Rusty Trichome on . keeping my plants alive part 2 So i read that great information on this page. Plants Can Survive Your Holiday I don't think i would have time to set up a time regulated drip system but it would be possible for me to leave them in water until i return. i would be gone for about 7-9 days and wouldn't just leave them out without water. What i'm wondering is if you put them in a bucket with water in it. do you just cover them or do you just leave a little water in the bottom for the roots to suck up or what? I guess Rating: 5