Is king british turtle and terrapin complete food suitable for young 1-2 inch turtles?

Im gonna buy a yellow belly slider turtle from a website and i also want to buy food aswell but it doesnt have much food so will king british turtle and terrapin complete food be suitable it doesnt say what age turtles its for so im assuming its for all ages. It also sells zoo-med aquatic turtle food but it says its for adults and it says reptomin sticks, that doesnt what age so I dont about that either. Which is better for a 1-2 inch yellow belly slider?