What branch of science does this article cover?

Question

im doing a science project and i need to know what branch of science does this article cover here's the link of the article

http://www.washingtonpost.com/wp-dyn/content/article/2008/08/17/AR2008081702197.html?nav=hcmodule

Answer 1

Marine Biology

Answer 2

It seems that the issues discussed in the article could be approached through a number of branches of science.  A couple that come to mind are chemistry, marine biology, ecology, perhaps even public health.

Answer 3

While the story is about an aquarium, its content deals with chemistry, specifically the chemistry related to water purification... removing particles, killing bacteria, removing ammonia, and removing the chemicals that kill the bacteria.