small eggs Austria

...they first digest it. Even if one sunfish were to eat a small goldfish every day (which it doesn't), you can calculate how long it would take to reduce a population of 1000-2000 (which is how many eggs a goldfish lays) before they grow too large at 1-2 months. And if you introduce several sunfish, you then have the problem of sunfish offspring. The pond depth should be at least 1.5 meters, as the sunfish can be somewhat sensitive to the cold European winter weather.