I'm not familiar w/ these brands of mixes, but mostly soil doesn't seem the best idea (like the 2/3 you're suggesting). I see you've collected others, so if it's working for you ... But pls. consider that in nature, these grow in crotches of tree branches, rather than soil, they're in leaf litter & debris, wastes & whatever else blows their way. So bark makes more sense that way, it's much lighter & more airy. (Indoors) I've mostly used soil w/ perlite myself thru the yrs. & have recently added a good portion of bark to my own holiday cacti. Am happy to report I've been able to keep an EC alive for a few months now in just bark & it's doing well. I've often struggled w/ECs 'til now. I've been using Repti Bark, from a pet store. Smaller (than Orchid bark mix), evenly sized pieces, nice. Perhaps try using that in place of your potting soil. So it'd be: bark, perlite & Cactus mix. Reviewing this old thread reminds me of Josh's point that bark mixes allow the copious watering these plants often get in nature.

Once you have the new pot with drainage holes, cactus mix, and perlite you can repot. Just take cactus out of the old pot. This will sound strange, but rinse the roots off to get all that old cruddy soil off. Once all the old soil is off. Put the cactus on a paper towel and let dry out for a day. Keep in a cool shady spot during this 24 hours. The next day you can do a mixture of 60% perlite and 40% cactus soil. The mix will be really light. That's what you need for good drainage. Most of the plants above rotted because of poor drainage. It's really important you don't water till you change the pot and mix. The cactus will be totally fine:). Once you have repotted wait a week and then you can water:). If you keep this plant inside you will probably only need to water once maybe twice a month. Inside water doesn't evaporate as quickly. Only water when the mix is bone dry. A good way to test if the mix is moist still. Stick a wooden skewer in the mix all the way to the bottom. Let it sit in there for a couple mins. If it comes up just slightly damp anywhere on the skewer don't water. What you have is a Euphorbia and Euphorbias are prone to rot. Actually it's two plants grafted together. The pretty one on top is a Euphorbia. You may need to give this plant more light. Your balcony may be a good place during the hot months. Always acclimate to the sun slowly or the plant will burn . A good starting point is morning sun afternoon shade. Do that for a week or two and then you can up the light little by little. Euphorbias are toxic. They have a white goo that comes out when cut. That is what's toxic. Don't let this stuff get in your eyes and keep away from skin. Lots of info:). If you have anymore questions just ask. Goodluck:).

This is a good year for cactus blooms. They got kicked around by spider mites last year, but, I think I got them under control and onto annihilating the little bastards. The reason I work at this... Prometheus

I see that this swap is over, but I have yet to find any fellow epiphyllum lovers on this site. So I thought this would be a good place to possible get in contact with someone who wants to trade. I have night blooming cereus, epiphyllum "disocactus akermanii", Easter cactus with red blooms, ad an epiphyllum with unknown color blooms (it's either orange or fuschia) I also have curly spider plant babies, curly lipstick plant, jade, and a couple different aloes.