One of the fish I lost in my tank crash was the rainfordi goby. I would like to get another one as he was my favorite fish in the tank. However, I would also like to get a Hector's goby. My question is will they be compatible? I know both are generally peaceful (never once saw any aggressive behavior from the rainfordi) but since they look so similar wonder if they will mistake each other for conspecifics and possibly fight. The tank is now a 75 with lots of LR and hiding places. Any insight appreciated!