Hipupchuck wrote in
:

RemiRemi wrote:
My mother lives on the ground floor of a condo. Her patio floor is
aggregate and there is a lot of moss growing on the floor. Does anyone
have an easy solution for getting rid of the moss? Pressure washing is
not an option as there is no water access for a hose on her deck.
Thanks.
Get some moss killer at Home Depot. It's ground zinc, copper and other
acidic metals. Sprinkle it around the the moss won't grow anymore.
Get one of those hose adapters for the kitchen sink or use a blow torch
to remove the moss growth already there.

OP:

As suggested, the zinc & copper will do it and prevent future growth as
long as traces of it are around and not washed away. They are used in
roofing as well. Impregnated into shingle manufacture to prevent algae
growth. Zinc & copper strips are also placed on roofs on the upside so the
rain washes it down and prevents growths.