what kind of fish?

Oops...I guess that would be helpful. comets, shubunkins and 1 Koi

Eggs hatch pretty fast, couple of days. Depends on water temp.

But it would normally be a couple of weeks before the fry might be noticed. Depends on food supply, temp and how observant the keeper is. In a fish tank when looking for fry of close they can be seen right away. But in a pond they aren't often seen until pretty big, like 1/4" say.

Thanks,I just noticed another smaller batch so they must be mine !

Oh, a new pond. How exciting. Glad your fish are happy! Please post pics!!

When I put in my pond I jumped the gun and got the plants first. I put the underwater plants in a blue tub with water and dug the hole for the pond, put the liner in,etc; this took a week or so. When the pond was ready, I put the water in and when I went to get the plants, I was amazed to discover a whole bunch of baby fish in the tub. The eggs must have come in on the plants. There were about 40 babies in there and a couple were fan tails of some kind.

So... you might have babies from your own fish or from the plants. who knows. It will be an adventure over the summer to find out!