I bought a bag of crushed rock (granite?) again without asking for the washed version.
The "unwashed" type has a dust that you can see when you pour the rock from one bucket to another and when I fill the bucket of rocks with water, the water turns a muddy color. So I have to wash the rocks and drain at least 3 times before water lightens in color. I have experienced this sort of unwashed rock in the beginning when I mixed it with cactus soil and planted my semps only to find that after the initial watering, the soil had compacted with the tell-tale cracks on top of the soil.
