It's going to be a while before I move Hurricane and Typhoon to an outdoor pond. Like, a few years (Or until they reach about six inches). Still, I have this big project planned, that I want to save money for. I'd like to know what I'll need so I can figure out how much I should save before they get so big that I have to buy a new tank again.
I've heard about pond filters, and adding plants like peat and anacharis to help keep the water clean, algae and bug free.
What is the most effective way to keep a pond clean?
I'd love to have some sort of circulatory water system, since in rivers and even ponds water never really stays in one place for too long, or changes from time to time. Unfortunately, I don't know how to build that, or build it in a way that it will be aesthetically pleasing and not take up tons of space.
(By the way, these girlies are going to be class pets for an art program I am starting years down the road. I need room for the playground and the backyard pond).

