http://www.wintecs.co.uk/catalog/Water+Purification-Resin,+Salt+and+Filters/c127_53/p1548/Virgin+DOWEX+Ion+Exchange+Resin+25L+MB50/product_info.htmlUsed them myself and havent had a problem.Rob.
Rhino, do you find dowex better than other resin? I bought tulsion 115, on the recommendation of nearly everyone, but it doenst seem to be lasting as well as the purolite I had previously, and everyone says purolite is rubbish!