Posted: 18/09/2017 at 09:36
There is no height setting on a scarifer just spike type things not blades, that pull the moss and thatch out.
We do ours once a year, then treat with a moss killer. we always get out about enough moss to fill a small caravan., although there isn't quite so much now as when we first did it.
I will take notice of Borderline and do it in the Autumn now instead of Spring.