BTW: I have a Calathea orbifolia that's been given the WaterWick treatment. One surprising benefit is that it's *obnoxiously* rootbound and doesn't seem to mind because it's always getting a consistent moisture supply. I have to refill my reservoir pot a lot more often, but it's the only way I've been able to keep a calathea looking not just fine, but actually fabulous.
---Justin
Costa Farms Horticulturist
BTW: Please don't judge me too hard for my confessed bad luck with Calatheas.