The third week seemed to hold much more larger organisms. It seemed as if the larger organisms had been feeding on the smaller species and depleting them in numbers.

Some of the larger organisms I observed were:

Aeolosomun sp. (Pennak pg.299)

Euchlanis sp. (Pennak pg.171)

Amoeba sp.

There were less but still a plenty of smaller organisms such as 

Euplotes sp. (Pennak pg.145)

The aquarium was also still plentiful in algae and diatoms such as

Mougeotia sp. (Prescott pg.102)

and 

Unnamed Diatom

There was is much more decay in the aquarium of things like leafs and dead organisms. The presents of algae seems to remain similar to the making of the aquarium, and the larger organisms seem to be flourishing while feeding on the smaller organisms, but they are still maintaining a relevant population. 

Bibliography:

Pennak R. Fresh Water Invertebrates of the United States. New York. John Wiley and Sons, Inc.

Prescott G.W.. The Fresh Water Algae. Dubugue, Iowa. W.M.C Brown Company Publishers.