Gently pour your cooled wort through your sanitized strainer and funnel into the empty fermentation bottle. You'll want the total volume in the fermenter to be 2 1/2 gallons. If your brew pot was big enough to allow you to boil a full 2 1/2 gallons you'll have to compensate for evaporation that took place during the boil. If you need to add water to reach the 2 1/2 gallon mark made in Step 4 do it now. Tap water is fine. You can use water from the 1/2 gallon you poured off in Step 4 if you saved it to a sanitized container. Bring the total volume up to the mark we made earlier on the bottle.