So, the pond is heading into it's second spring.

Last spring there was a lot of fishy activity and the resulting fry. The goldfish genetics is interesting as there are offspring that have no resemblance to the parents. Out of a couple shubunkins, an orange and white, the offspring include all black and other variations. None look like their parents.

So, before I wind up with a fish ghetto, I can use some advice on not breeding fish. I have a small 40 or 50 gallon tub I could use.

What are my options? And if I pull out fish, do I pull the chasers or the chasees?

You could also try keeping the pond around the same temperature the whole year to prevent breeding.