Well i have recently been having an aptasia outbreak. I used the Red Sea Aptasia-X n honestly it only made it worse! Sprouting babys everywhere. So i treated again earlier on all the largest ones. I was planning on trying some peppermint shrimp either today or tomorrow. As well as my first emerald crab. Is there a certain amount of them i should add for a 37 tall. Just dont wanna go overboard on them. Also i wish i could add a few other crabs. However every crab i have ever tried adding for some reason or another becomes food for my blue legged crab. My last attempt i added 2 scarlet reef, n 3 red leg dwarfs.