Hydroponics Growing Media - Gravels & Pebbles
Gravels and pebbles are easily available in India. However, they’ve many drawbacks. The primary drawback is both cannot hold water. Though gravels have sharp edges and can hold water and oxygen in curves, but not for a reasonable time. So, watering has to be very regular, to keep them moist. Gravels also react with water and change the pH level. They are heavy, so, they can hold big plants, but, it’s difficult to transport them for their weight.
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