Does anyone out there have any knowledge of liff combi-flo polyphoshate scale inhibitors? I have a large blue canister fitted to the feed pipe to my boiler. It's filled with what looks like mothballs and these have now dissolved to a mush and a small amount has escaped through a valve in the centre of the cap.Is this normal? What I'd like to know is Will this stuff clog my Boiler and Should I clean out the container and refill it? thankyou