what would be the best to use for this
20mm gravel or 10mm gravel in the mix
the bags of ballast i was going to use have 10mm
or should i buy the 20mm gravel and sand seperate
thanks
20mm gravel or 10mm gravel in the mix
the bags of ballast i was going to use have 10mm
or should i buy the 20mm gravel and sand seperate
thanks