Well today was the day that I finally started adding the CUC to my new 90g. I didn't want to start out with the whole CUC at first, in case there was not enough "stuff" for them to eat, so today I picked up 10 crabs, 26 various snails including 1 mexican turbo snail. While they were acclimating in the bags it looked like I had a lot of CUC but once I added them to the tank I could tell that it was only a "drop in the bucket". Over the next week or so I will be adding 2 cleaner shrimp and 4 peppermint shrimp. So I guess my question is, how many more crabs/snails should I get?