The frozen-yogurt battle between Pinkberry and its competitors (Yolato, Öko, /eks/, et al) is pretty much a big bore by now, but the impending arrival of the grandfather of all Korean yogurt chains, Red Mango, may stir the pot a little yet. In sheer number of living germs or “cultures” as they’re called in the yogurt business, Red Mango claims to have an almost Malthusian population advantage. “To be called yogurt, a typical refrigerated supermarket product needs to have 10 million cultures. Ours has 500,” a Red Mango representative told us. But the big mystery is where Red Mango will land. A Grub Street informant noticed a sign in Flushing announcing a new store. Given the area’s large Korean population, this makes sense. But the company has spoken only of its future Manhattan store, at 723 Eighth Avenue. Just how many Red Mangos are on the way? And why are they called Red Mango when they sell yogurt? When we find out, we’ll let you know.