Japanese Translation: 100% Japanese natural black ash soil. Maintains a soft water environment that is ideal for breeding aquatic plants and freshwater shrimp (especially caridina shrimp) for a long time. The buffering power of the soil can absorb pigment leached by driftwood, the phosphates that lead to algae, etc. is adsorbed by the power of the natural soil. Platinum Soil will give you highly transparent water and good breeding parameters for shrimp.