IMHO, this fish will likely never grow, in fact it's more likely it will decline and die.
Lusk had a very good example of a gent spending many 1,000's of dollars on large fish to make a trophy pond, including stocking 1000's of appropriate sized BG to support them.
When they are grown in one place they are programmed to continue in the same manner, which we know can never be duplicated.
My personal opinion.