Goby shrimp relationship

[Supernova26]

So I got a Yasha White Rayed goby and a pistol tiger shrimp for the biocube 29. The only fish in there that I rarely see is a small yellow watchman goby. After acclimating and introducing the goby took off hiding and the shrimp started digging a hole. 5 min later I come back to see the shrimp digging and the yellow watchman guarding the entrance. So now I got a White Rayed goby who lost his buddy. Can I keep 2 pistol shrimp in the same tank?

[jawfish]

I do, I keep a Yellow Watchman with a Tiger Pistol Shrimp and a Hi-fin Red Banded Goby with a red banded pistol shrimp. The only problem I've encountered is once when the much more active watchman/tiger duo burrowed straight into the hi-fin/banded hole. The Hi-fin/banded pair were about twice as small as the watchman and the tiger, and got evicted, so I had to shoo them pair into another hole. You could try another shrimp, but I'd try to get a shrimp of similar size or species to the one you have. I have found that the Tiger pistol shrimp seems to like to pair with the yellow watchman more than other, smaller gobies. Just my observation.