In terms of descaling, I have nothing particular to say, only in terms of Bosch products, I realized that for my Tassimo (Bosch), I could not perform without a descaling in particular disc that performs the said descaling cycle. So for Tassimo, the only pellets are useless without buying more DU special disc, which has its special bar code, communicating with the coffee, the order of descaling launch.
Personally, I found the famous disc (referenced: 617771) on:
achat-grenoble.com
PS: conventional cleaning disc does not perform the descaling cycle