Groups for Selection:
1) 4 Green Porcelain Crabs (peaceful filter feeders)
2) 4 Emerald Crabs (great hair and bubble algae cleaners)
3) 2 Horseshoe Crabs (around the size of a quarter, great for stirring up substrate and scavenging, they will not to well in a high flow aquarium and prefer substrate to burrow in)
4) 4 Pithos Crabs (similar to emerald crabs but slightly larger, have a great temperament and do not fight, and they eat a variety of algae)
5) 4 Peppermint Shrimp (good scavengers, will eat Aiptasia)
6) 25 Medium Blue Legged Hermit Crabs (staple cleaners, great for hair algae