Скачать или смотреть We're Adding African Catfish to our Sandponics System for Additional Benefits: 2022

We are introducing African Catfish to our Aquaponics system.

The main reason being that they can withstand colder water temperatures than tilapia. They are know to survive water temperatures as low as 6C. This past winter was rather harsh on our tilapia, with water temperatures dipping to 12C overnight.

PLEASE NOTE: The information on water temperature survival was given to us by the breeder of the catfish fingerlings based on a study published in an article titled "Temperature Preferences and Optimum Temperature For Growth of African Sharptooth Catfish (Clarias gariepinus) Larvae and Post Larvae" published in 1987, P.J.BRITZ and T.HECHT. In the article it mentions " under laboratory conditions it can tolerate temperatures as low as 6C" . This of course would apply to adult fish only, and of course its open for debate, as it does not mention for how long they can tolerate temperatures as low as 6C. It could thus be misleading to assume that catfish will survive for long (or at all) at 6C. From our experience, our adult catfish have survived through the past 4 winters with water temperatures as low as 12C. At these temperatures some of our adult tilapia died. Our breeder has water temperatures in their earth ponds dipping as low as 10C without any adult fish mortalities. In the same article above " Donnelly (1973) established that a diurnal temperature range of 13.5C - 27.5C did not have any effect on the survival of adults (catfish)" . If you wish, feel free to send us an email via our website www.myaquaponics.co.za and we will gladly share a link to the above-mentioned study.

Ideally, you want to keep water temperatures for most fish species in the 20C to 28C range

The other benefits of the African Catfish is that you can hold high stocking densities of over 100Kg of fish per 1000 litres. This is because they have rudimentary lungs, which enables them to survive in low levels of Dissolved Oxygen in teh water. They swim up to the surface of the water to gulp for air when required.

They basically also eat anything, so they're a very good generator of ammonia.

Sandponics has given us superior results, so we are looking at growing that option further.

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