This sure sounds like soil mealybugs. I would do as the others have suggested. Look at the soil and roots for the sign of cottony webbing that soil mealy bugs leave. If you do find that this is soil meal bugs, I would not take a chance of having them move into the rest of your plants. I would either throw out the plant or cut it off at the top of the soil and reroot the crown. I would also get some Marathon and treat all your plants preventatively. Cedar Creek Violets sells 8 oz. containers of the Marathon. Another product many growers use in their soil is diatomaceous earth that helps to prevent soil pests. Good luck, ItsDeb

Thank you. I did some reading on edema, and mine really doesn't look anything like what photos I could find. My room is around 64 (and I use heat mats) and more on the normal to dry side. The plants look perfectly normal until you look very, very closely. They still seem rather healthy and the undersides of the leaves are perfect.

Fungus gnats can certainly be annoying and difficult to eradicate until you know how. I haven't used "Mosquito Bits", so cannot comment beyond saying that it sounds like Danielle317 has some experience with the buggies. I have tried folk remedies like bowls of water with dish soap and yellow food coloring added and tried the yellow double sticky tape. They worked some, but did not end the infestation. The local Cornell Cooperative Extension identified the winged beasts as "fungus gnats", also known as "fruit flies". They suggested a product called Gnatrol, specifically designed to combat fungus gnats. Gnatrol is easy to use and works well. After the soil has a chance to dry, a small amount of the concentrate is mixed with water, then the soil is drenched as the larvae lives across the surface of the soil down to about 3". (I generally use 5 ml [1 tsp] per 2 liters [2 quarts] of water.) Since it effects only the larvae, in order to get rid of everybody as they mature, the soil must dry between servings and the drench repeated once weekly for three weeks. PROVIDE NO OTHER WATER. Just to be sure, I throw in another week or two. By that time, there will be no more larvae left alive to grow into adults. This thread further discusses Gnatrol: http://forums.gardenweb.com/forums/load/pests/msg0411022110590.html There is a link provided for an informative article at the Colorado State University. (I was unable to find the product locally, but readily found it online.) To prevent an infestation: * The gnats normally live in the soil outdoors where they can find yummy rotting organic material. They may try to enter through open windows when outdoor conditions prove unpleasant for them (too dry, too wet, too cold). Extra-fine mesh screens may help keep them out. * Examine produce before you buy it. If you see fruit flies (fungus gnats) flying around it, do not buy it. They may have already laid eggs in the flesh of the produce. The eggs are way too small to be seen with the naked eye. * As soon as you see the first gnat, ACT IMMEDIATELY! Water all your plants with Gnatrol x 3 weeks minimum. All the best luck!

I hate to be a contrarian, but have you thought about trimming off the roots a bit and transferring them to some potting soil? You would have a much healthier and probably a faster growing plant. I realize some love the idea of growing a plant in water, but unless you are using a full-on hydro setup (oxygenator, nutrient solutions, etc.), I don't feel as though it is best for the plant. I mean, totally fine for rooting cuttings--no issue there. I tried a pothos in water over a long period of time, and what I ended up with was moldy looking roots, despite frequent water changes, slow growth, and gradual decline. I trimmed and put them in soil, and the plant is huge now. Just a suggestion.