Originally Posted by purplemuffin
How many goldfish would you suggest for understocking while still looking nice? Let's say I bought a filter made to filter up to 500 gallons. Even understocked, would it be better to get double filtration, like one that could filter up to 1000 gallons?
8) I'm asking you so many questions, I'm sorry!
No worries. I'll answer to the best of my abilities. One thing about stocking you'll want to keep in mind is water surface. If you're going to have a completely square tank then you will be limited in stocking. You could follow the koi stocking levels and go with about 500 gal for one fish, but I can understand not wanting to do that with just 600 gal pond. Maybe go with 100 gal per fish?
On the other hand you could try to get a breed of goldfish that stays smaller. Ryukins are known to be small, but I don't know hot they would handle the Dallas winter. I think shubunkins tend to stay smaller than commons and comets.
For the actual level of filtration, I don't think I can answer that. Filtration is something that I'm not even sure about with my filtration on my normal tanks. That might be a question for the pond club guys.
Aww, thanks, Sakura. ^-^ It really is my pride and joy.