you also said that Calci sand is easy to clean, any sand is not. when they poop it soaks up everything, and unless you change out all of it, you are more than likely leaving some in to grow bacteria. Calci sand is also VERY dusty, which will lead to RI.
Impaction does not happen over night, it builds up slowly and then without notice will start putting pressure on your reptiles spine. Your not having any problems now, so are you going to wait until something does happen? Were not trying to be mean, were just trying to help your beardie