7 of 7 people found the following review helpful
Always use the appropriate descaler for your machine,
This review is from: Gaggia Descaler Decalcifier (250ml) Bottle for Espresso Coffee Machines (Kitchen & Home)
Different manufacturers use different seal and tubing materials in their machines. These can be damaged by using the wrong descaling solution. A friend of mine recently wrote off his rather expensive Krups automatic by using cheap kettle descaler - it's not worth the risk. I have a Gaggia, so used this descaler, which (unusually) is Lactic acid based. It seemed to work fine and left no discernible taste in the machine. No complaints.