What is fish stocking density for an Aquaponic system?
In general, stocking density is the ratio of fish, based on their weight, to the unit or volume of water. When it comes to Aquaponics, it is a little, no, a lot more involved than that.
For a well designed and balanced Aquaponic system, the ratio between plants and fish is dependent on your system size and how much the fish are fed.
Disclaimer here: My research comes from experts, not those who are still experimenting with their systems and put out videos claiming to know all about Aquaponics and Aquaculture. Based on what they have to believe (and what we follow for our systems), the standard rule of thumb is 1 lb. of (adult) fish for every 8-10 gallons of water.
To calculate this, you need to know out the type of fish you want to stock and how big they will get before you either sell or harvest them. For tilapia, adult size is generally 1 lb; so you can keep 1 tilapia for every 8-10 gallons of water. In a 55 gallon fish tank, you can safely house 5-6 adult tilapia. Just don’t be tempted to buy 100 fingerlings as each of those cute little fish will grow up to be about a pound each, and depending on how heavy you feed them, within 1-2 years. To appropriately house that many tilapia, you will need about a 1,000 gallon fish tank!
- Nate Storey, Bright AgroTech: https://www.growaquaponically.com/watch/?t=Aquaponics+Stocking+Density&id=IPEFlhRBaQI&d=RmlzaCBzdG9ja2luZyBkZW5zaXR5IGlzIHZlcnkgaW1wb3J0YW50IHRvIG1heGltaXplIHlpZWxkcyBpbiB5b3VyIGFxdWFwb25pY3Mgc3lzdGVtLiAoUmVhZCBtb3JlOiBodHRwOi8vYnJpZ2h0YWdyb3RlY2guY29tL2FxdWFwb25pY3Mtc3RvY2tpbmctZGVuc2l0eS8pIEluIHRoaXMgLi4u&q=aquaponics,Fish%2520food
- Brandon Collins Walravel, James Madison University: https://commons.lib.jmu.edu/cgi/viewcontent.cgi?referer=&httpsredir=1&article=1522&context=honors201019