matrix

I have a Bosch Silence Plus series 4 which I'm not using. I saw that the matrix reservoir on the left side of the dishwasher had water in it. Should I drain this or can it be left as it is even if I'm not using it?

I have a old Collier Fireplace (model Old Manor 16EN). I need the matrix bed for the fireplace or it will have to be completely replaced - which seems such a shame just for a bed of artificial coals. However, the business no longer exists and phone calls to the old number go unanswered. Does...