Lastly, the tank can become overcrowded without being overstocked. Without some form of animal population control, goldfish ponds can easily become overstocked. In rural areas, the Native Reserves Land were overstocked and in deteriorating condition. Because of this, California's grasslands were overstocked causing progressively more damage. If it is overstocked, it will starve. The performance of "The overstocked barrel" (V. P Aksyonov). Guess he was overstocked with that color.