(Optional) Explain how to perform a partial water change and filter change on an aquarium.

Explanation should include

• identification of when changing the water and filter is necessary
• reasons for wearing gloves
• the standard procedures that must be followed for changing the water and filter
• reasons for not completely draining the tank.

Process/Skill Questions:

• How often should a filter be replaced?
• How can you determine when a partial water change is necessary?
• How should the replacement water be prepared?
• What might happen if you changed all the water in a fish tank?