Ive never had a pond or koi before. Our new house came with a 950 gallon pond filled with Koi and goldfish. I think there are too many koi so i have already given some of them to a pond care store. I have also noticed some of my Koi are pregnant how do i go about taking care of baby koi? do i do anything? should i just sell mama off beforehand? Im completely new to this. I think i would like to keep the larger Koi the smallest is about 2 feet and the largest is a bit over 3. My Orange and Black koi has 2 bluish silver crescent shapes on its side, what is this is it normal? if you can tell me what kind of Koi i have ide like to know. Also if anyone knows how to keep mesquitoes down around the pond i would greatly appreciate it, any helpful advice really would be great.