I recently was came across a nano from a friend.. well I filled it up from the big tank and its been sitting empty for well over a month.. had the water tested a few times and everything is good to go! Still adding LR, bought a bunch of little pieces and put them in the big tank til I was ready to fuss with it, well.. I liked were i put them in the bigger tank so I think those are going to stay were they are!! But I went to the LFS to get a piece of LR... and I ended up buying 3 sexy shrimp... they are the cutest little buggers!!  But I added a few things from the big tank into the nano.. 2 crabs a snail.. and a chunk of Xenia. But I'm still kinda stumped on what to put into this little nano??!! Any ideas/ suggestions?? I was thinking maybe a firefish and a clown goby of some sort... or maybe even a nano full of sexy shrimp!! BTW, I think one of them is bearing eggs!! Anyone know anything about how to keep sexy larvae?? I really didn't find any info!!  Oh, and theres a refugium in the back of this nano... what goes in there?? Cheato or LR or something?? My other tank doesn't have a sump so I don't really know anything about that subject... as it also has a light, what is its purpose?? Sorry for my headbangers But I'm still learning... and was kinda curious to see what others thought