It reduces the amount of minerals that may be found in some sphagnum. Also, while what is supposed to be in the bag is "Pure Canadian Sphagnum", it is not unheard of to find time released fertilizer pellets or those moisture retaining crystals. I have found both of these things in my (supposedly) "Pure Canadian Sphagnum".[b said:Quote[/b] (LauraZ5 @ May 08 2005,11:09)]Why would anyone rinse sphagnum?