Question About Making Mesh For Filter

[RinaLane]

What kind of material/fabric I shoul buy to make a mesh to hold peat moss granulas? Is it tulle or something similar that I can sew together in bag shape?

 

[Munroco]

the foot off of a pair of tights (stockings) will work

 

[RinaLane]

o-o never would think about this simple solution!
Elastic ones withhold water flow & granules movement?