The gravel was delivered very quickly. I had already read, but that he must be strongly washed so strong I had not imagined it. It took 2.5 kg for 1 hour to wash him. In the beginning was real mud from the gravel. When the However, schedules and applies enough patience, you have a really nice and quite cheap to aquarium gravel. Pure black, he is not, however, more natural. It is a predominantly black gravel, which also contains light gravel.
