I read somewhere thsat if you are using a water softener that you can raise the temp slightly on the hot water cylinder stat. Is this true and if so to what temp? Mine is set at 60deg at the moment.
You can raise it anyway, and if it's factory insulated there's no reason not to bang it up to 65 if you need the extra water. Just be careful if you have small kids as the water will of course burn you more easily. And a little extra in wasted heat.
The reason you have been told that is because your water will be softer & will not create scale build up,which happens when setting the temperature on the boiler is 65+ in a hard water area without a softener.
Ideally the temp setting between 60 - 65 this keeps Legionella at bay,but if you set the temp higher you the need to fit temp blenders to prevent scalding.