Product Description:
Hydroponic Square Medium is an important planting substrate for modern agricultural production made of phenolic foam have good chemical stability, non-toxic and non-polluting. It is specially designed for fast and convenient vegetable gardening. Its high opening ratio makes it have excellent water absorption and water retention performance (no loss of nutrient solution), and it can lock the nutrients and moisture needed to maintain plant health.
| 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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