Ok I read the what is a nano reef thread and it didnt tell me much. Is a nano reef basically a small saltwater tank. If so just how small can they be to support life that will thrive? I have a tons of old 1-2 gallon tanks that I want to do something with I used them for bettas a while back. What equipment do I need and how hard is it keeping and successfully maintaining one? I've seem threads titled 2g new nano and can you really keep fish on there happily if so id like to attempt it. I've done freshwater never salt water but always wanted to do saltwater I thought you had to have all this expensive big tanks and equipment and it was difficult.