I hope this forum is suitable for my request for advice. I've had a small 100 gallon pond for 3 years now, stocked with two feeder fish who have grown from less than an inch to 4 and 5 inches long. As it turns out, they must be male and female because I'm counting 3 or 4 babies now. They've just turned color so it's much easier to see them. I'm delighted that I've given them all a good enough environment to flourish but now I'm worried about numbers. I'm using an older model Lifeguard Aquatics All-In-One system that is more than adequate for my small pond but will this be enough?

Do goldfish stop reproducing after they've hit some "critical mass" in a pond?

Thanks so much in advance for your help!