What a cool fish! I have sworn to curtail my keeping of "monster" fish, limiting myself to one: my beloved Jelly Cat. I haven't studied up much on the goonch species, but was for some reason under the impression they were all absolute behemoths; watching too much "River Monsters", I guess. The sizes mentioned in this thread make them much more appealing. And I absolutely love the structure of their faces, with those unique "webbed" side barbels.
I wonder if they are this slow-growing in nature as well, or is there some characteristic of captive life that limits the speed of their growth. Almost two years and yours has gone from 6-7 inches to a measly 9? Compared to the growth rate of a Jelly or a RTC, the difference is amazing. I wonder if even a high-current tank is still too close to stagnant to suit them perfectly? Again, just going by Jeremy Wade, they cope up with some serious flow rates in nature.
I missed a chance to get one...forget which species they listed it as...when a local importer/dealer offered them a year or two ago. I'm somewhat regretting it now. Looking forward to following this thread!