descaling

I want to introduce a solution of Fernox DS3 descaler into my Tribune unvented cylinder which is heated by immersion heaters. I live in a hard water area. Water softener is not an option. Here's what I propose: 1.Turn off electrics, cold and hot water. This isolates the system completely. 2...

Hi All, New to the forum; but read through a lot of threads and solutions for possibilities around combi boiler, before posting. Bought a flat that has a Ariston MicroGenus (not sure how old). The hot water in the shower (both through shower head and bathtub tap) fluctuates from hot to barely...