Oh, and the moldy (Hello from across the pond!) succulents are a common problem. Let them dry out ALL. THE. WAY. between waterings. The soil should be crumbly. If the leaves just barely start to wrinkle, that's alright as long as you get to them soon thereafter. You can seriously let them go weeks between waterings sometimes. Check out some of my other posts for some of my succulents that are doing well.