I don't crush it. I buy if from the brick factory. They crush the defective bricks and sell. I use it in the patio.
View attachment 429005
View attachment 429006
View attachment 429007
Oh and yes I sift it to desired size. This is 1/8" and 1/4"
View attachment 429008
Oh and yes I sift it. This is 1/8 and 1/4 inch
And the weight is a bonus in many cases with plastic training pots and bushy trees setting around the pond. But a back breaker in the big pots for sure.