I have 11 ten gallons and I know they are small, but im working with the space thats in my bedroom.I feel like the ten gallon is an underated size, especially on more experienced hobbyst. Im breeding GBR,GR,EBR,and BRs. I also have done apistos,red eye tetras,and white clouds. I do have 4 29s that i use for growout, so i would have to go with a ten as my fav size as of now.