I have used a cleaner in my system (for a month) and have spent ages flushing it out and draining each radiator. Now time to put in an inhibitor. Do you get what you pay for - or are they all essentially the same stuff?
My house is 20 years old - Worcester Heatslave HighFlow Boiler - microbore pipes to Maxtwin radiator valves (but it works!).
Any comments on best for value additive will be appreciated. (I have always had an additive in)