On 05/03/2022 20:48, Chris Hogg wrote:
> As per title

Use Benzalkonium Chloride instead. It won't stain everything rust
coloured that it touches, unlike ferrous sulphate. The moss, will,
however, turn brown when it dies. IIRC I used it as a 1:8 dilution from
the conc solution (BAC 50) purchased from Amazon. I am pretty sure it
would still have worked at a lower concentration, so I'll try 1:20 next
time. That might not be for some while, as it's over 3 months since I
used it with no sign of moss regrowth at present.

--

Jeff

On 06/03/2022 08:04, Chris Hogg wrote:
> On Sat, 5 Mar 2022 21:57:10 +0000, Jeff Layman
> <jmlayman@invalid.invalid> wrote:
>
>> On 05/03/2022 20:48, Chris Hogg wrote:
>>> As per title
>>
>> Use Benzalkonium Chloride instead. It won't stain everything rust
>> coloured that it touches, unlike ferrous sulphate. The moss, will,
>> however, turn brown when it dies. IIRC I used it as a 1:8 dilution from
>> the conc solution (BAC 50) purchased from Amazon. I am pretty sure it
>> would still have worked at a lower concentration, so I'll try 1:20 next
>> time. That might not be for some while, as it's over 3 months since I
>> used it with no sign of moss regrowth at present.
>
> That's useful, thanks, as I have some of that, and if there's any
> diluted solution left over after I've done the moss, I'll use it to
> spray the PVC guttering where it's gone green.
>

I use bleach and caustic soda mixed in water and then spray it on my
block paving drive. It does the job for me.