concealed cistern limescale/gunge removal?

[pr1970ster]

Hey All,

After 9 years of installation our concealed toilet cistern decided to continually run water down the pan. I removed the cover and reset the drop down plunger but everything looked a bit limescaled and gunged up. Any recommendations of what is best to clean it up with? I sprayed a load of viakal down there but wondered if there was something more effective and wont damage the plastics in the cistern.

thanks

 

[oldbuffer]

Kilrock (easier to get) or Ataka. Both OK to use with plastics.

EDIT: LOTS of ventilation with either

 

[HERTS P&D]

Pour a bottle of Viakal (500ml) in the cistern and leave it over night. It should clean it up nicely.

Andy

 

[pr1970ster]

Thanks, will give the viakal ago and if that doesnt shift it , i`ll try the kilrock.