I am new to the hobby and have a 12 gallon AquaPod that has been set up for about 3 months. I have a Sally Lightfoot that has been living peacefully in the tank for about 4 weeks. I added a Pom Pom crab last night after being re-assured by the LFS that they should be fine together. The Sally came over to check out the new crab, but not sure if it was just curious or being aggressive. Everything seems fine so far, but am I asking for trouble? I am now hearing that the Sallys can change personality over time and become aggressive. Should I get rid of the Sally before it starts causing me problems, or has anyone had luck with them in this size tank? Any help would be greatly appreciated!