Harvesting Your Fish
If you are keeping fish in your system for eating, eventually it will be harvest time. Needless to say, catching fish in a tank isn't that difficult and all you need is an appropriately sized net. Depending on the species of fish, you should be taking them in at around 1 to 2 lbs in size to make a decent "catch". You can easily net one, weigh it and pop it right back in the tank if it's too small. The growing season time will vary by species and the environment you are creating for your fish. For example though, a tilapia will reach dinner-size after around 8 to 9 months in a well-maintained tank.
For tanks where you plan on having a breeding cycle to replace your harvested fish, then you have to make sure you leave enough mature adults at harvest time to reproduce. And in case you didn't think of it, you'll need to know which ones are male or female too.
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