Provide advice on how to accomplish the following goal. Give ONLY the advice, no other words or explanation.
For example:

Answer: <advice, as short as possible; a single sentence!>.

Goal: Filter water using a charcoal filter.
Instead of coffee grounds, use activated charcoal.  Rinse the charcoal well before placing the charcoal in a coffee filter.  Place the coffee filter into the coffee maker and proceed as if making coffee, instead it will be clean water.
Use charcoal to absorb impurities in water. Place charcoal in a filter and pour water through it. Replace charcoal