Product Description:
Tenlead Hydroponic Square Substrates are made of perfect materials, which is phenolic foam. These Hydroponic Square Substrates also use the latest technologies and innovations to achieve unparalleled germination efficiency. They are easy to install and handle. Non-toxic sterile phenolic foam-substrates water erosion, helps prevent stem rot, thereby ensuring plant safety. They are the ideal media for automated processing, uniform germination and a high success rate with pricking out.
| Material | phenolic foam |
| Density | 11-20kg/m³ 40-50kg/m³ |
| Pore space | 90-98% |
| PH value | 6.5-7.4 |
| Electrical conductivity(ds/m, 20C degrees) | 0.55 |
| Shrinkage | < 0.01% |
| Compressive strength(kpa) | 20-31 |
| Fully available water(%vol) | 50-61% |
| Water retention time(h) | 72-144 |
| Water retention capacity(%vol) | 50-91% |
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