Hey guys! I just got a pair of shell dwellers for 3 dollars at my LFS because they didn't know what they were. The poor things were in with the guppies and had nowhere to hide. Now they are settled in my tank with two nice shells and it looks like they may be a breeding pair because they are sharing one shell even through I gave them two. One is significantly smaller than the other. Could I have gotten lucky enough to have bought a male and female? If so, what can I do to encourage breeding?