yes he means bala sharks, they are commonly known as silver sharks here in the uk.
ive read they can hit 12"+ but ive also read about some going round that dont grow larger than 6", how true i dont know.
imo prepare to house a 12" fish which needs to shoal with a few other so 4+ in a group. ive heard from other keepers and know from experience )only had them at about 3-4") that these need a long tank because they are like missiles and often bash themselves off the tank sides.
and mastodon thats a very negative view of the forum. if a post doesnt get answered its probably because they dont know or the post has only been up for a short time. 99% of the time someone chimes in but you can help yourself with the useful search button to the top right of the selected forum. generally people are very happy to take unpaid time out of their busy day to help but they do not, however, respond well to people who do not appreciate the fact it is time out of someones busy day.