Free shipping in Germany from 15 €
Free shipping to EU, Switzerland and UK from 69€
Free shipping to EU, Switzerland and UK from 69€
Excellent pure mineral soil
| Characteristics: | excellent pure mineral soil, mixture of lava, pumice and highest quality zeolite. Grain size 1 - 4 mm, especially suitable for smaller pots. Outstanding water and air guidance is achieved by the grain. We will make you an offer to the European neighboring countries, if we have to show them the postage costs. About 50% form zeolites, which are skeletal silicates. Their outstanding abilities are caused by their mineralogical structure. One of the special properties of zeolites is the high and reversible cation exchange capacity (CAC). To balance the negative charge of the crystal lattice, ions are adsorbed on the outer and inner surfaces of the crystal lattice. The cations can be replaced by ammonium or heavy metal cations, for example. The minerals of the zeolite group are characterized by a pronounced selectivity for various cations. Particularly strong is the binding to certain heavy metals such as lead, but weak binding to naturally occurring cations (sodium, calcium). A middle position is occupied by cations such as potassium and ammonium. The adsorption of, for example, heavy metal or ammonium ions is always associated with the exchange of the existing ions. During fertilization, nutrients such as ammonium or potassium accumulate in the soil solution. This high nutrient content, which can not be completely absorbed by the plants as a rule, is offset by a low concentration in the zeolite. Part of the nutrients are adsorbed in the crystal lattice of the zeolites and are protected in this form from decomposition / conversion or leaching. When the nutrient concentration in the soil solution decreases, the zeolites release the nutrients so that they can be absorbed by the plants. Zeolites do not change their physical properties through ion exchange. We use zeolites from the group of clinoptilolites. |
| type: | Vulkastrat fine, 1-4 mm |
| Item number: | 700075 |