Friday we got a group of stems. Right now they have been rinsed and are sitting in a bucket of water in the kitchen (brightest room). How long do I keep them in there. I'm changing the water daily.
Unless you have a "quarantine aquarium", I don't recommend leaving them in a bucket more than a day or so. I've found that aquarium plants deteriorate if left in a bucket. I think they need the heat, filtering (water movement at least), and substrate that they get in an aquarium.
I used to use lime water (dilute solution of dolomite lime), and potassium permanganate (Jungle's Clear Water drops in water, to a pale pink). I've now switched to a bleach solution, for two reasons. One, I still got snails surviving. Two, I don't want to take any chances on fish store's water containing disease pathogens, or virulent algae. Bleach sounds harsh, but if I lose plants to it, that's okay. I'd rather that than have my fish sick, or my tank overrun with algae.