it works great the shrimp i have use that wood alot for hiding.
I would give them 10 ⭐️ if they have that option.
Received the two 4" Cholla Wood last week. They are much bigger than I thought! So I only used one. Soaked in separate water for two days to sink. It did tan the soaking water but hopefully it wouldn't tan the tank water that much. Shrimps love it and climbed over it as soon as I put it in the shrimp tank. Glad that I bought it :)
Shrimp love them, but it seems they came with eggs from some type of red worm on them as hundreds of them appeared after I put the wood in the tank (Only thing I had changed in the tank in 2 weeks outside of water so I'm fairly sure they came from the cholla wood). Would definitely recommend the optional boil as mandatory if you don't have anything in your tank that would potentially eat those worms.