Questions about Brita Maxtra Pro Extra Kalkschutz

No, that's unusual, in my case the filter cartridges are dry.

As soon as an item is no longer available from a supplier at the price they offer, we switch to the next supplier. This is how we ensure availability. As a result, the price of the product may increase as the new supplier offers us the product at different conditions.

I don't know whether it measures the number of litres or rather the length of time from activation. I meant that I change it every month. However, we have heavily calcified water and I filter about twice a day.