How Large Would It Get?

There is a guy on here who has a Wallago leerii, the wels' little brother. He also has a 52,000 gallon tank.

His large female Wallago is as big or bigger than the all tackle world record wallago. Iirc she is iver 150 pounds. If you give them space, they will grow.



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Never kept one,but my W.leerii grew extremely fast,like Chix says. Mine got to 30" or so in about 2 years. I only Fed it about 2-3 times per week. My past and current Wallago attu catfish grow similarly fast. The one I have presently is 17" or so and maybe a year old or so. I think Wels should be about the same , although water temperature and tank size will have a lot to do with it. A few people at this site keep Wels ,maybe you can get an answer from them.

From what I have read the real giants are like 50. I think most max out around 4'. I would search European fishing sites and be prepared to use Google translate.

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I had the W.leerii about 18 years ago. It ended up at a Public aquarium. As for the Wallago attu, I am building a house in the next year when I don't have kids in high school . That way don't have to stay in their school district. My plans are for a large fish room with about a dozen species tanks. I am going to build one large tank approximately 16-18'x6-8'x5' tall. Been waiting for about 15-20 years for it. Saved college money. Now time for fish money. I will be doing a thread on it from start to finish.one That's where I will house about 4 Wallago attu when done. Stay tuned.

fatboy8 said:

I guess really what I'd like to know is would it be wrong to accommodate a Wels to it's average size in the wild? .

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Most cats grow their entire lives and only stop growing at death. Yes, their growth slows dramatically when they reach sexual maturity, but they do continue to grow.

The question one needs to ask themselves is not how large of a tank do I need; but rather, 'how long do I plan to keep this fish'?

If you succeed in keeping that wels alive for 20+ years, there's no reason at all to believe that, given clean water and quality food, the fish should fail to reach 6' or so.

Take from that what you will.

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Agreed. Just like adopting a small ugly kid. It's a long term investment and you're in charge of its health and safety forever, as it will not be going to college, getting married,and moving out on its own. Lol!!!