The mesh that is used to keep mosquitoes out, in our window screens is about right. If it goes through window screen, that powder that goes through the screen should be discarded. Fines are bad. You want the "chunky peat".
Sunshine brand Canadian peat moss is not milled, it is not ground up. This is the good peat. or any other brand that is not ground to a powder.
A set of sieves is handy, as uniform particle size makes better bonsai soil. Typical set of sieves for bonsai media is only about 25 to 45 dollars.
A Soil Sifter is used to sift your soil before repotting to remove dust and to achieve a unified soil particle size.
sumobonsaisupply.com
