At the Alginator is a handy cleaning tool for the nano aquarium, because he very effectively removes algae. However, I have in my tank the typical "shrimp-gravel". This consists of small black stones. This in turn remain in the bristles of Alginators hang when times loses adhesion to the magnet and actually getting when you clean the glass right above the gravel, because there obviously also accumulate algae. It is very difficult to remove these stones, as they have the same color as the Alginator, so I sometimes even overlook small stones and then scratching the aquarium, which I find very annoying. I'm going to buy myself another cleaning brush. Buy recommendation only for aquarium owners with less fine gravel.
