echinosum wrote:
'p.mc[_3_ Wrote:
;881372']Hi all

I was about to jet my patio but the pressure washer broke. Is there
another
way of ridding this stuff without jetting; and preferably the less
labour
intensive methods please?
In DIY places, garden centres, etc, you can get some stuff called
Patio Magic. You just dilute it and spread it on with a watering can.
It kills the algae quite quickly, and your patio will smell like
rotting seaweed on a beach for a few days. It then, as explained on
the container, takes quite some time for the algae to flake off. I
thought it wasn't going to work, but it did gradually do the trick
for me.

Back when, I used to use bleach, bought as "dairy hypochlorite" in
25-litre drums from the farmers' suppliers. This was, I think, the
cheapest weapon, and you can saw each black plastic drum into two very
durable tomato tubs, or take the bottom off to give you a rhubarb
forcer, or cut down lengthwise to make troughs for piglets, etc etc.

--
Mike.