In that case, then a 1 gallon is a fun challenge! I started off with a 0.5 gallon betta tank with a couple of mushrooms... I loved that tank!Thanks. It actually wouldn’t be my first SW. I currently have a Dwarf Seahorse tank running. I do have a few 10 gallon heaters and a few 1 gallons laying around. The heaters have to be set to 78 degrees. Do you think that’d be a problem? Thanks for the advice.