What heater/s and filter system/s would you guys recommend for this tank? I bought the starter BS from the LFS, which I'm sure comes with the bare minimum for a single goldfish to survive. What is the hot setup for filtration and heating? I see a lot of Fluval this and Eheim that, but no idea what would be good for this tank. I only have an external cartridge type filter system hanging off the back, which is noisy and gets clogged quickly. Thanks for the help.