What is the fine-grained topic of the following text: Location 1,2 and 3 is green Discus Symphysodon aequifasciatus I was buying 2006 - 2008, location 4 is brown/red Symphysodon haraldi I was buying in 2006 and location 5 and 6 is Blue Symphysodon haraldi I was buying in 2009. Only return the topic.
Purchasing history of specific types and colors of Symphysodon fish at different locations.