I've never tried the Arfican violets in my dart tanks, but the other closely related gesneriads have never done well for long--perhaps a year or so, and then they rot off or scraggle a lot, and never bloom again after the first few months. I think it may be ultimately too humid and not sharp enough drainage for them, as well as perhaps not enough light. I do grow some African violets otherwise, under rather dry, pot-bound conditions with lots of light, both natural and artificial, not much fertilizer at all, and they bloom all the time. I actually mistreat and sometimes ignore them until they are next to wilting before I water them again. Whenever a plant has hairs on its leaves, as most gesneriads do, be suspicous about how well it will ultimately continue to bloom and survive in a very humid, comparitively low-light vivarium. For many months they look great, and then they may begin to straggle and decline. I'm inluding a picture of Kohleria "flirt" here, which I was once most enthusiastic about, and indeed it did perform for awhile, well over a year. Now, it is barely surviving, and not blooming at all, because the tank conditions for dart frogs aren't the same as the plant requires over-all.
Experiment with it, maybe I'm wrong.



-----
Patty
Pahsimeroi, Idaho
4 D. auratus blue
5 D. galactonotus pumpkin orange splash back
7 D. imitator
6 D. leucomelas
4 D. pumilio Bastimentos
4 D. fantasticus
6 P. terribilis mint and organe
4 D. reticulatus
4 D. castaneoticus
2 D. azureus
4 P vittatus
2 P. lugubris