Data Sufficiency

A saltwater solution completely fills a glass cylinder. If the solution is then poured into a larger rectangular aquarium, what percent more solution would be needed to completely fill the aquarium?

(1) The ratio of the diagonal of the base of the aquarium to the diameter of the cylinder is $$1:\sqrt{2}.$$

(2) The height and width of the aquarium are equal to the height and diameter of the cylinder.

The OA is C.

I am a little confused here. Experts, may you clarify this for me? I'd be thankful.