Water Purification Tablets. We stock a range of water purification tablets from Life Systems, MSR and TravelProof. We stock chlorine tablets, chlorine dioxide tablets and chlorine solution, which can be used to help kill bacteria, viruses, parasites, giardia and cryptosporidium. We also stock neutralising tablets to help take away the taste of chlorine in your drinking water. Purification tablets are a great way to treat clear flowing water. If you using water which is not clear flowing, check out our range of Water Pumps, which will help you to filter water, removing sediment and particulates. The sale of iodine for water treatment has been banned from sale within the EU since 2009, and therefore iodine tablets and iodine tincture are no longer available from Complete Outdoors.