Shrimp and Goby question

[quakstar]

Ok so I was wondering if I have a shrimp goby already in my tank if i added a mated pair of pistol shrimp would they have their symbiotic relationship and work together or would they have needed to be introduced together or is it the mated pair if them being a pair is a problem could i just add one single one what is the best solution for me

 

[nemofreak]

I have 2 gobies and 2 pistol shrimps added at different times and they figured it out all on their own. Sometimes they switch bed mates.