The rock is fine unless you smack it into the glass from the inside. A large tankbuster could break the glass if they hit the rock real hard.
johnnyxxl said:I know many people that would take the contents of one tank and add them including tank decor, fish, gravel, and water directly over to another. Honestly if I were to decide to do a large barb tank I would prob just do the same with mine depending upon the circumstances most of the good stuff is in the gravel and not on your filter though the stuff on the filter should be enough for a lightly stocked tank.
i know tinfoils quite well, my father had a pair for 21 years.Haggisman said:Looks good but you might want to rethink the tinfoils, they will start to predate on your smaller fish(if they have not already)not to mention they get massive.