View Full Version : diaphram or piston type hand sprayer

trying 2b organic
03-02-2004, 10:19 PM
I think my hand sprayer is piston type. It is the Spraymate 16.
Ive been told that for applying wettable powder such as ferrous sulfate (for moss) that I need a diaphram type sprayer. Why might that be? Is it true?