This descaler is one of the most potent calcium deposit removers I've seen just in general, even without getting into the specific concerns of ice machines.It is concentrated, so it is supposed to be mixed with water for a cleaning. With water added, the red concentrate turns blue.Being curious to see how this would compare to the usual mainstream calcium/lime/rust remover chemicals that I've used for decades to clean my nickel-plated faucets, I mixed up a small amount of concentrate with water in a disposable cup. Starting with my wet bar sink with a decent amount of crusty calcium build-up, I merely dipped the tip of the faucet into this descaler solution for 5 SECONDS, and saw that everything was completely gone, leaving the faucet clean, with no scrubbing or anything! Compared to the other chemicals I'd normally use for this sort of thing, where I'd expect to leave the faucet parts soaking for 15-30 minutes, and then still require some scrubbing, I am quite sold on this being my go-to faucet descaler too.