I changed mine for the first time last night, at the beginning of the lights-on period (I'm doing 12/12 now), and the plants look droopy still. Would they have less stress problems if I did the changeout at the beginning of the lights-off period, or does it even matter?
I should add that I'm using a RainForest 18, and have to lift off the top platform containing the plants and set it aside while I change out the reservoir, so the roots do get some movement and hassle (they're pretty intertwined in a big toroid around the center rootguard).
I should add that I'm using a RainForest 18, and have to lift off the top platform containing the plants and set it aside while I change out the reservoir, so the roots do get some movement and hassle (they're pretty intertwined in a big toroid around the center rootguard).