I've raised koi for about 10 years now. Goldfish are a little different they are hardier than koi so much easier to maintain.
Despite what I have seen posted you do need some type of filtration. Fish poop and you need a way of getting rid of it. Plants help remove some of the nitrogen that this fish waste causes.
Waterfalls and little fountains add air to the water, warm water in the summer holds less oxygen. air exchange like that also helps rid the pond of nitrites that fish waste put in the water.
If you want to keep your pond relatively free of algae you need to keep it shaded. The best way is with a shade tarp or shade sail, they keep your pond cooler and free of leaves. If you get a pond that turns green from an algae bloom like the one pictured here you can install a UV filter or spitter that will kill the microscopic algae going through it and will keep the water clear.
This is a good start but there are online resources. Try koiphen.com or koishack.com they both have online forums and there are people there that know tons more than I do.
A WARNING though some of the people there are not as nice as the people here!
Despite what I have seen posted you do need some type of filtration. Fish poop and you need a way of getting rid of it. Plants help remove some of the nitrogen that this fish waste causes.
Waterfalls and little fountains add air to the water, warm water in the summer holds less oxygen. air exchange like that also helps rid the pond of nitrites that fish waste put in the water.
If you want to keep your pond relatively free of algae you need to keep it shaded. The best way is with a shade tarp or shade sail, they keep your pond cooler and free of leaves. If you get a pond that turns green from an algae bloom like the one pictured here you can install a UV filter or spitter that will kill the microscopic algae going through it and will keep the water clear.
This is a good start but there are online resources. Try koiphen.com or koishack.com they both have online forums and there are people there that know tons more than I do.
A WARNING though some of the people there are not as nice as the people here!
