Pistol Shrimp Question

[WallyBackm]

Have: 72 gallon reef tank

 

I purchased a pistol shrimp about 2 months ago. Never saw it, thought it was dead.

 

I purchased another pistol and a goby, both good size (both from Rudy--great guy and great shrimp and goby), and they bonded immediately to the far left of tank.

 

This morning out of the blue i see the pistol i bought 2 months ago in the middle of the tank.

 

Questions: is it ok to have 2 pistols in the same tank?

 

Can I get another goby to bond with the newly discovered pistol or would this goby battle with my other? If not, can a pistol make it without a goby?

 

Thanks all.