why my goldfish are not breeding

my goldfish are mature i have 3 but none of them had reproduced.

Hi,

Just read this article and you will come to know everything about goldfish breeding.

Enjoy

The breeding season for the goldfish is in the late spring and early summer. In New Zealand goldfish will generally spawn anytime form early September through to late February. Usually goldfish are over 8 cm long before the sex is recognizable and they will breed. Males will get "nuptial tubercles" on their head, body, and fins when in breeding condition. These tubercles appear as hard white pimples, about the size of a pinhead, and look much like the ich or other parasites. A fish bearing these tubercles is always a male. Their abdomens swollen with mature eggs the ripe females can be easily recognized by their body shape.

For best results keep males and females separated before breeding. Feed them well with a variety of foods - good quality dry food supplemented with live food. When the breeders are well conditioned and ready for breeding prepare an aquarium or pond with mesh water. The ratio we recommend is 3 males to 2 females. The fish will generally spawn with an increase in temperature of about 2潞C. You can either let this happen naturally as weather patterns change, or spawning can be induced by simply raising the temperature a little. Goldfish will breed at any temperature between 10-26潞C, although about 20潞C is the optimum. It is important to remember that it is the change in temperature not the actual temperature, which triggers spawning activity.