I started with one in my 37. It split after a year, 7 months later one of the clones split into 3. (one is going tomorrow) I am tearing this tank down and replacing it wiht a 50 gallon soon. I have a 14 gallon biocube, it was my first tank in here put the very small rose thinking I could move it if I needed to. It split twice in 2 months, now I have 5. Five in a 14 gallon is too many but they are all very tiny. I will be getting rid of them soon enough, our club has a frag swap comming up next month. Eventaully I want to keep all my roses in the 50. I also have a 15 gallon w/mini carpets, there were over 30 at last count but I know theres more than that now, they multiply like crazy. Lastly I have a 2&1/2 gallon next to my computer, it just has softies, a clown goby and loads of mini brittle stars. I didn't set out to have so many anemones, it just happened.