My only reservation with this cleaner is that a lot of decking has a balustrade around the edge which is usually the same colour as the deck. If this has to be cleaned too it could be a right pain the the proverbial and costed as such, which might dissuade the customer from having the job done.
To remove moss and such it wouldn't exactly be plant friendly.
Going to see my next door neighbour who has a small amount
Offer to do it for free and try it out and try and remember to time
how long it takes and take some piccies.
Anybody tried it yet?