[JandS]

Does this stuff have any detrimental effect on gardens as in if it gets on grass plants etc is it ok?
Seen pictures where it's used on paths next to borders and it seems ok.

[Mike Halliday]

We use SH (which I believe is the same as black wash ) it does bleach grass slightly around the edges of the patios but It does no permanent damage we walk across gardens with it on our shoes and it's not a problem

[JandS]

What mix you use Mike....I believe this stuff is only 2% and can be legally washed down drains.

[BDCS]

Without starting a battle with the PC police, strictly speaking you cannot wash SH which is what blackwash is down any storm run. You can however put it down a foul run unless its a septic tank system. SH's life is short lived once exposed so there ain't that much to worry about unless your a fish. Plants need a good wetting before and after. Strength wise start weak and increase until it works. Also look at DDAC. Do your RAMS before you start