Cholla Wood provides the perfect place for shrimp to hide and is a great natural decoration. This wood breaks down faster than most others resulting in a faster bio film\grazing area for shrimp there fore it is will be an excellent long term natural food source.
The Cholla cactus (Cylindropuntia imbricata) are native to the American Southwest and northern Mexico. The remnants of these dead cactus branches results in a soft wood. Cholla Wood has an interesting pattern and does not contain as much tannic acids as other woods or leaves. For the best result add a few to your tank and use them as decorations. I have seen people attach moss and others have used them in aquascapes.
There are many different natural products that you may be able to find in your area that you can add to your tank to spruce up your scape and help the overall health of your shrimp. I will be adding more products to this thread as I come across them. Figured this would be a good place for someone new to shrimp to get answers as to why people put these things in with our shrimp!