Ryukin tank size, final answer please! Who wants to be a bazillionaire?!
I have an extra 20 gallon high tank (24L X 12W X 17H) laying around and would like to keep a single 5 inch Ryukin goldfish in it. However, everything I read seems to say something different about minimum tank sizes for goldfish. Even on Wet Web Media I have found conflicting opinions. Some say 20 gallons is OK, but others say no, nothing less than 30 gallons is appropriate for goldfish.
