Search for gritty mix. You will find plenty of iterations on how to make a good substrate with no peat in it. Good luck!

Try not using the sand unless it is really gritty. Do you have photo of it?
Where are you located? Are they inside whole year?
I have many succulents is mix of just chicken grit+perlite, or chicken grit+turface. No peat, coir or even bark. I never bought a cactus mix in the store, but that could be used if you have to - as long as you mix it with at least 50% of perlite.
Rina

Here's the completely inorganic mix I use on all my succulents.

It's basically 3 parts Turface to 2 parts granite, but I split the Turface portion into a 50:50 mix of Turface and Napa Floor Dry. Turface and Floor Dry are pretty similar in function, but I like the additional color from using both. It works great for me, and will never decompose/collapse.

-Chris

Chris
very similar to what I use, only difference is that chicken grit is white in color...Rina

Yeah, our local granite is called cherry stone. It has a purplish color due to its iron content. I didn't like it at first, but now I think it's nice.

-Chris

Turface seems to be the ingredient of choice here, but I'm not familiar with that brand, at-least not in my country. Is it crushed clay?

The Napa floor dry looks like something I have seen in many pet stores, possibly with a different brand name. I know there are two types: the type which clumps (becomes dough-like) such as Bentonite clay, and the type which does not clump, remains solid and does not agglomerate. Any way to distinguish the two just by inspecting through the bag?

Pet-store owners may be unfamiliar with possible uses for soil mixes and may provide inaccurate information.

One test we recommend to determine the stability of the product (since batches are not all the same here, either) is to soak it overnight, examine for durability, and then freeze and thaw some of the product. This should tell you how hard / durable it is.

Josh

Nomen....the 'we' are the many individuals at GardenWeb who answer the question about appropriate fired clay for use in container mixes.

Josh

asclepiad_fan
What is your country?

You can substitute turface with crushed pumice.

Fungus gnat is best treated with Bacillus thuringiensis, often sold in granules and mixed with water. It occurs naturally in the soil but has to be introduced into your substrate for potted plants.

Bt will get rid of gnat eggs in the soil so they don't hatch and the adults will eventually die out. It's been a while since I had this problem so look up the life cycle of the gnat and water accordingly.

I hope this helps.

Pagan

rina_: I live in Israel. I don't think I have the same brand in my country.

nomen: "we" was meant my friends and I who grow cacti. We use different potting mixes, and all contain peat or coir to some extent. I have greater success with home-made potting mix than with pure peat. Some seeds may tolerate a day of drought between waterings and the fungus gnats will usually stay away, but some seeds need a constant supply of humidity. The latter may be more prone to gnat attack.

asclepiad

Thanks, that's why I asked:-)

Maybe you can find following link interesting:

about cat litter

Rina