Specimen Container/Convalescent HomeThe Lee's Large Specimen Container is a multi purpose clear container with a one inch (1") wide handle for hanging. This versatile container can be used in the following ways: As a treatment hospital tank for sick fish (less medication is required) As an observation area to get a closer look at suspected sick or pregnant fish As a holding tank for newly purchased fish before introduction into the aquarium Heavy Duty: 5. 13" x 2. 5" x 4. 5" Small: 5.