Delicate doesn't even begin to describe them. I have six, and keep them in a 30 gal with some ottos. In my expierience I have found them to be easier to keep if you use RO water and add the trace vitamins to the water or filter through peat, and do a 20% water change weekly to keep the water quality as best as it can be. I also like to keep them in lower light with some driftwood and java fern as they tend to be skittish and stress easily. I also keep all males because they are next to impossibe for me to get them to spawn. I hope any of this helps.