QUOTE
We do have 1 pond, its really big about 1 million gallons, now the problem is that there are native species of fish in there, putting goldfish or koi in it might disturb the natural ecosystem.
I also have a really big pond of about a million gallons it's (it's hard to estimate gallons) about 14,000 square feet surface area and 25 feet deep. The pond was dug and has a sand bottem. Because of the size of the pond it also has a natural ecosystem and is maintanance free. You don't have to worry about disturbing the natural ecosystem I've had goldfish in my pond for over 10 years.
QUOTE
But my mother said that maybe we could somehow cut off a corner of the pond with a wall or something and use that as a goldfish/koi pond!
You can use a seining net. That would be the cheapest way.
Is your pond landlocked? Keep in mind that if your pond has any streams coming into it or flowing out of it that it will be illegal to put goldfish or koi in it.
QUOTE
Your wild pond is naturally balanced but it also naturally contains pests, parasites, and predators like hydras, leaches, diving beetles, turtles, snakes, and other stuff.
Sure a wild pond will have this stuff in it but it's not much of a problem in a large pond. Turtles are cool too.
QUOTE
A natural pond would be cool if it JUST had goldfish/koi, but native fish LOVE to eat goldfish and koi, and what they don't kill, they harass until they die anyway. Native fish and goldfish/koi DO NOT go together. The idea to section off a portion of the pond is interesting, but it would be impossible to medicate if you needed to or catch fish if they needed out-of-the-pond treatment.
Native fish will eat goldfish and koi until the goldfish and koi grow to big to eat. In large ponds you don't have to worry about your fish being harassed until they die because your fish will just swim away. Goldfish and native fish go together just fine as long as the goldfish are too big to eat. In my pond the goldfish and bass swim around together. The goldfish are too big for the bass to eat so the bass don't bother them.
In large ponds you don't have disease problems like you do in small ponds and aquariums.
QUOTE
Sorry kiddo, the natural pond idea seems great on the surface, but it's probably not the best choice for your fish. And you want what's best for them don't you?
A large natural pond is the best place for your fish. Much better than any aquaruim or small pond. They always have fresh water and lots of good healthy live food. When keeping goldfish in a large pond there are few things you have to consider: It is illegal to put goldfish and koi in a pond that is not landlocked, If the pond has native fish in it you will want to keep your goldfish separated until their too big to eat or just buy big goldfish, Seeing that your in Canada your going to have to get singletail goldfish, wakins, or koi if you want them to survive the cold of winter.
QUOTE
I wish I could get a pond, had them convinced for awhile, but they like the 110 gallon tank alot better than a pond.
If your natural pond is landlocked ask your dad if you can put goldfish in it. Buy some goldfish that are too big for the native fish to eat and they will start breeding in your pond. Some babies will get eaten but some will survive just like every other fish in nature. You could then buy some small goldfish that you like and put them in your 110 gallon tank. Then when they out grow your 110 gallon tank or get too big for the native fish to eat you could put them in your big pond. The fish to consider for your big pond is any singletail goldfish (common, comet, subunkin), wakin and koi.