Robin - where do you get your pumice? I use the same 2-2-1 mix but I use perlite instead of pumice.

I have added Reptibark to the 2-2-1 mix for larger pots with mixed results. I had a large DR rot in this mix, but have used it with other plants with no rot. The bark does tend to break down quickly and I have to repot in about a year and a half.

All of my plants are outside in the Florida summer rains. Those on the lanai still get the 2-2-1 mix, except for my TCs. Sorry that isn't much of a change for experimentation! LOL

Thanks, Crenda. I buy the pumice from General Pumice Products. It's not cheap, but I really like it. With an inorganic mix, I don't throw it away if I lose a plant -- I wash it well and used it for something else so the "investment" isn't lost. I have so much trouble with perlite -- floating to the top and breaking down quickly. In truth, I used Reptibark in everything (on the advice of people here) when I started, but I wasn't too happy with it. I had several plants rot, and I found it stayed wet way too long, while the other ingredients were well dried out, so I never knew whether to water or not. But thanks for the reply.

Ha - I can totally relate. I saw yet another Opuntia Gumby at yet another Walmart and I have to admit, I didn't sleep at all last night thinking about if I should go get him or not!

Oh - soil. I've been experimenting lately with my own custom mix. Pumice, grit, perlite and a dry-stall-esque product I get at Tractor Supply - I think it's called Oil Dry or something like that. Pretty much a 1:1:1:1 of those ingredients. I'm in NE Florida - hot and humid and in the summer, very wet. My plants are out in full sun, full rain.