clown tank sizes?

Better pic
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check out this big brute at the Shedd Aquarium in Chicago. I went there last weekend, it was a blast!

Biggest clown loach Ive seen in person, 11"+ and FAT!
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I definitely agree that the slow growth of these loaches allow people to keep them in smaller tanks for the time being. But in terms of final tank sizes, I don't think 30 in a 120 gallon would be an ideal situation.
 
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