Malowie, how do I include you for the BE mass order...you being in M'sia?
I don't sieve 'cos I am lazy. So far, the plants are not unhappy with the finer particles. It probably works because I am careful with my watering...if outdoors, the soil tends to compact with heavy top watering or rain. In fact, some of the pieces of burnt earth is so big (2" across) that I have to use a hammer to break them up.