Roof Cleaning setup

Hi Guys, I have had a read of various topics/posts on the forum and I am just looking for confirmation I am going to have everything i need to take care of a roof clean of my own property. My roof is starting to be taken over by moss and it will make a perfect place to practice roof cleaning before potentially offering it as an add on service.

From reading posts on the forum I will need : 

Skyscraper

Waterfed backpack and pole (already have this)

Softwash nozzle

AlgoClear

I have had a look on Rutland Pumps for the nozzle which is recommended however it is out of stock, Any other which are recommended. AlgoClear...how far will 5l go? Anything else required that I am missing?

Cheers

Have a look at da components as he does spray nozzles.