Mentalguy2k8 wrote:
What is the single most effective (available and legal) solution to
getting rid of scale below the water line in a toilet bowl?


Blimey youse lot have problems,boilers header tanks,ch
problems,limescale,here in Australia we have none of that,I have not
seen a toilet with limescale in 70 years.
There may be an extremely small portion of aus with water probs like yours.