After clearing out all my sand I'm in need of a new clean up crew. Trying not to waste anymore unnecessary money then I have to. Snails are usually good when it comes to certain algae. Crabs are good at eating leftover food and decaying items. Now one would think it would make sense to have both. But crabs are known for eating snails and taking there shells. I'm thinking of adding 3 cleaner shrimp and 3 fire/blood shrimp and then just adding snails. But the shrimp can't get into nooks and crannies that the crabs can. What's your thoughts?