I agree. I spent 5 hours cleaning 1 1/2 bags of SMS in Atlanta heat. I feel that it was worth it. That stuff is very dirty and even with all my cleaning the water still becomes cloudy. There is no way I would add that stuff directly to my tank w/o prerinsing it first.http://www.plantedtank.net/forums/substrate/47555-soilmaster-2.html
take a look at this members heartache over not rinsing. I think it is worth it.