Hello all,

We have a 2,500 gallon pond, two 3,000 gal/hr pumps (usually only run one at
a time) with a stream and waterfalls here in Southern California. We had
three koi at one point but lost two (one to a dog raid on our pond and
another to physical problems). We have corrected both problems.

We now have a single koi and several comets, but they appear to be
inter-breeding.We now have a great many (a couple dozen fry and larger
offspring), some black, some mixed colors, etc.). My understanding is that
these mules are sterile, but it seems like everyday I see more fry.

Although I am glad the pond is healthy and producing, I am concerned about
what to do about the potential overpopulation of the pond.

Do you cull a pond? (I hate to think about this).

If so, how is it done humanely?

Thank you in advance. We rescue spiders in the house and release them
outdoors, so the idea of killing our pond inhabitants is not attractive.

best,

OD