Most likely not. If there are goldfish, then there are definetely going to be predators. Goldfish are small, and one predator could eat about 5 goldfish. It's very unlikely, but possible.
pond
The goldfish will eat the mosquito's larvae before they can leave the pond and fly.
yes
no the goldfish would it the tadpole
This is a literature question not a goldfish one.
goldfish
Year round, but especially in Spring for pond goldfish.
snails
Yes they can
usually cats
not if it is your pet. you have to go to the oet store for certain pet food for goldfish
Yes, snails will overpopulate a pond if you let them. It will take a while, but they might. You can bye fish that eat snails, if you want them.