I grew up with my mother waterin her house plants with ice cubes, most were ended up to be huge. The problem with people is that they believe the if it works for them and their friends, then it has to be the only way of doing something. I see everyone screaming bloody murder about the ice cubes, using potting mix, certain fertilizers, certain pots, still and yet there are those few that have orchids thriving in the very things you deem wrong. I thought this was a forum to see new things and meet new people, learn what works for them and experiment for yourself.
If the ice cubes are working for this guy. Find out how, why, what, when, where. Ice cubes didn't kill my mother's plants, I still have some and I wet them the same way she did.