BN Hydro Supermix™ is a one component mineral fertilizer especially developed for systems with artificial substrates such as rockwool, polyurethane slabs and perlite. Nutrients for growing are combined within one product, which makes cultivating very easy. In bloom, the addition of BioNova™ PK 0-13-14™ provides the increase in phosphorus and potassium required for best results. All of the elements are free of any profuse ingredients. Therefore, this fertilizer is absorbed directly, and a low PPM will suffice.