Thank you for help! I’m torn between the thougt of a small (12-16gal) tank wich I understand would limit the options and species, or go larger (26-36) and have more options. I definitly do not want my new friends crowded or unhappy. I like that nano cubes are compact and convienent , however I already have a 72bow reef tank and custom fitting filters,lights etc. is no problem. I have already built my own refugium and light, canopy setup. Should I be looking for different species of horses? Any help to solve my dilema would be greatly appreciated.