Crystal-Tops range of powdered fertilizers consists of very pure additives, which guarantee residue-free production of the plants. The fertilizer is produced in Switzerland and thus guarantees a very high quality. It can be used on all substrates. For hydrocultures the addition Calolit is recommended. This is not necessary on soil. Only 3 fertilizer concentrates which combine a considerable yield with a good quality, these are the characteristics of a Swiss success story which is exported all over the world.