Please choose the correct solution to the question: How to purify your water manually?

Solution1: For water purification, carry a Katadin water purifier without spare filter element and Potable Aqua water purification tablets. They can purify up to 500 liters of water each,

Solution2: For water purification, carry a Katadin water purifier with spare filter element and Potable Aqua water purification tablets. They can purify up to 500 liters of water each,

Answer format: solution1/solution2
Answer: solution2