When I was in Guam last summer, we visited the Underwater World, where they had Clown Loaches that were pushing 2 ft long.
Fish won't grow that huge in your aquarium, mind you. No fish will reach it's acual potential size in an aquarium. They have barbs there that were almost 8 inches long and so fat.
I still keep clown loaches in my 55 gallon tank, and know they need a larger home, but I wouldn't suggest to people to not ever get them because of the size they can grow in the wild...or in a huge tank!
75 gallons atleast would be good, IMO
Just my two cents.
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