I am looking for advice on type and number of anemones to place in my small aquarium. The only other habitants will be a pair of clownfish, a cleaner shrimp and a few hermit crabs/snails. I'm guessing RBTA (quadricolor) but not sure if I should go for more than one (it won't be that large) and/or another species that lives on sand or near rock/sand edge. Any thoughts from those with experience would be appreciated.