So I've chosen the Swiftech H220x over the Corsair H100i to watercool, mainly because of its ability to expand and cool my GPU etc. Swiftech recommended refilling the reservoir after the three year warrantee is over. They have their own coolant for sale on their site but I was wondering if you can use good ol distilled water and a silver coil instead of having to order the coolant. I just prefer the water in general as it's abundant lol and I don't need to order a bottle of coolant and wait for it to be shipped to my home.