hmm ok we have a good sized pond out back and every spring afterthe water thaws (snow country) we seem to have at least one or two new fish we do sometimes lose some of the goldfish over winter as well. We have noticed from our fish that we can sometimes notice a fish or two as little little babies around aug or sept there is alot of plant cover atthat time of year and we may only seethem once or twice then come spring thaw we can see them and they are about as long as our pinkies (koi are longer than my forearm mature gold fish as long as my hand) we have had this pond running for about 7 1/2 years. Now gold fish and koi too will breed if there is enough room to allow more fish as well as growingto fit the size of the home they live in once they reach X size they will continue to grow but more slowly.
Nyrmel Neewbie extrodinary luvr of things furry, finny, or the color purple20 gallon planted 1 blueygray guppy, 1 ghost shrimp, 1 mystery snail(bulldozer), 3 mollies tux,edo and spot(dalmation) unknown fry Warning I can't spell to save my life, & I tend to ramble... alot. Also an avid outdoor ponder with 5 koi and a dozen goldfish and wonderful assortment of plants