Which descaler should I use with my espresso coffee machine?

The only descaler recommended for safe use with De\'Longhi coffee machines is De Longhi descaler \'ECODECALK\' which can be found on our  website
The De\'Longhi descale solution consists of natural ingredients which are completely safe for use with our coffee machines and will be gentle on working parts.
For usage instructions please see your owners manual for your machine.