I use solutions final phase acid rinse which i have found to be the most economical to use it also is supposed to be good for pumps, i had a Jubilee clip which was all furred up with scale so i immersed it in a neat mix of final phase it made short work of it and came out like new.
What i wanted to ask is could it be use to maintain my inline heater and pump, obviously not neat but in a stronger than the usual rinsing dilution.