I personally like to let mine get low on water. When I water, my goal is to water them as much as I can without getting any run-off. Mine can easily go 2 days between watering. I have let them go for 3 days without them wilting, but they were very light/dry. I am too afraid of root rot to keep the reservoir constantly topped off. If I did not defoliate, I do not think I could go that long though.