Chewy, a 4000% increase is 40 Carp to maturity for each breeder
Still its a scary number if you think that in 3 years, those 40 carp will breed another 1600, and within 3 years after that 65,600.
100 carp now = 6,560,000 in 6 years....
It's probably capped based on food and environmental factors, but it's easy to see how they choke a waterway.