There are many different types aquaponics fish, climate conditions and available supplies are two important points you need consider. Trout and Tilapia is definitely the more popular specie in aquaponics. This is mainly due to them being hardy, grow fast and taste delicious. Trout is more suitable for colder geographical locations and Tilapia for hotter climates.
If you’re not into growing fish for food, gold fish, guppies, koi and betas are also suitable aquaponics fish depending on the scale of your system of course. The main concern here is the fish must produce sufficient excrement to be converted into nitrate for the plants to flourish (more “poo” = more nitrate).
Now, let’s look at a little bit more detail in some of the more…
Popular Aquaponics Fish
Tilapia is an extremely hardy species,
they taste good and fast growing. Lives happily in temperatures between
74 – 78 degrees F. Grows to plate size in about 6 – 9 months (ideal
conditions). Omnivorous and eats pellet fish, veggies from the system
& duckweed and can be stocked in high densities. |
Trouts like colder water in the range
of about 64-68 F. A great tasting fish but need pristine water
conditions to grow healthily. They have extremely fast growth ratios and
are sensitive to pH changes. They would reach plate size in 12-16
months and are great aquaponic fish. |
Barramundi
Barramundi is one of the more majestic
species of edible fish, they grow in warmer temperature and is a
delicacy especially if grown in an aquaponics environment. A good choice
for summer. Buy mature stock and harvest them by the end of the season. |
Crappies
Crappies is one of the favorites for
aquaponics as they develop really well in a closed loop system and they
are very good to eat. |
Catfish is a popular species among fish
farmers in the United States and Australia. Their meat is so smooth and
tasty especially when steam cooked. They tend to be more sensitive to
temperature, pH and water quality and can be harvested in 5-10 months. |
Silver
Perch is a hardy native Australian fish and they can survive in high
temperature variants. The downside is that they take a comparatively
longer time to grow from fingerlings to adult size. |
Tilapia 
Trout
Catfish
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