Advantages of Rockwool |
1-It has a large water retention capacity, and also holds sufficient air. It holds a lot of water which gives you an advantage against power or equipment failures. And it also holds 18 - 25% air which gives the root system ample oxygen so long as the media is not completely submerged. |
2-It is available in multiple sizes and shapes for various hydroponic applications. Everything from 1-inch cubes to huge slabs. |
3-Rockwool is also durable, it doesn't readily fall apart or break down. |