Cinta, the key with the split rocks (Pleiospilos) is to allow the soil to dry out before watering, then water well. I have managed to keep a Pleiospilos going for years given this treatment. The flowers have a lovely smell. If you put the plant in a larger pot or community pot then make sure it's not deep, and the mix needs to have excellent drainage (like 50% or more rock). Don't deprive the plant of water (ie. don't let it sit there bone dry for extended periods) or you will stress it out and make it more likely to just plain fail when it does eventually get water.
