Nope, not Senecio. That's a bad Exotic Angel ID. It's Dischidia nummularia. There's been a big debate about it over on the Hoya forum. It's the most tempermental of all the Dischidias I've grown up to this point. It's been suggested the best way to water is from below. What tends to happen is he stems start to dry out or rot. A bright spot without hot sun will be fine inside. Be careful with your watering. You can go over to the Hoya forum and find out more info. Denise in Omaha

Hey milly, Im in the uk and I use gritty mix, and I use reptibark from Amazon, turface I get from tesco cat litter, and perlite from anywhere, although I tend to leave out the bark these days because the only good stuff I can find I have to get from Amazon as reptibark and is too big so I literally spend hours in front of the tv with pliers breaking up the chunks! The things we do for plants... Perlite/turface alone does a great job ime, and I actually find it easier to water because bark sometimes "floats" to the top when watering. The cat litter is a tad on the small side, but as long as you screen the small bits it works great. Perlite is easy, normally very suitable sized particles, just screen out small bits, but make sure it doesn't come with any 'additives' like ferts. I would love to use a nice grit, cause perlite looks a bit garish, and always floats to the top because it's so light, also doesn't weight down plants all that great, but I can't for the life of my find a good source of grit which looks good and isn't expensive aquarium grit D: I'm sure @greenclaws will reply soon, but I'm guessing she adds abit of soil to increase water retention a bit? Gritty mix is fantastic, but is very gritty. For my drier succulents it's literally perfect, and it works great for other plants too, even my mango tree seedling! But you have to be reeeeeeaaallly vigilant with it, because sometimes it dries real quick and plants like jades can shrivel a bit and not achieve maximum growth potential. A bit of soil, while compromising gritty mix's aeration, can make the mix a lot more usable. I have jades in pure gritty, soil/perlite, and pure soil, and I do find my soil jades do better because I can't quite keep up with them. But only marginally. I dunno, that's my understanding anyway :P You also need to fert regularly with gritty mix. hope this helps a bit! Aaron

Your description is of a plant that's losing older leaves from being too dry. Kleinia petrea is a succulent, but it's not a cactus. If the mix isn't extremely dense, going completely dry might be unnecessary. Hard to say w/o a current pic.

7' away from the window is way too far, that is why it is leggy. Mine are kept in as much sun as possible (after being acclimatized), outside during warm weather. You didn't post better photo...but all stretched parts should be pruned off. They do not 'shrink even if given best light after growing in darker conditions. So you need to look at your plant and decide where to cut. You can plant few together if you wish - I prefer 1 plant/pot. This plant grows more tree-like, and many stems in same pot could interfere with each other. You could grow "jade forest" but it really requires good light and lots of care. This is bonsai style, looking really great if properly cared for: See how straight trunks are? And they are slightly tapered. They are also of different height. Branches and leaves are purposely pruned to achieve the look. Typically, they will grow more 'crooked' by trying to get out of the way. BUT they will grow. Looks like you have multiple stems right now? Do you like the look? Aim for healthy plant(s) with stronger stems/trunks; better color and (usually) larger leaves that grow closer. That will happen only if there is proper/more light.