On 07/11/2020 15:29, alan_m wrote:
On 07/11/2020 15:18, The Natural Philosopher wrote:



The problem is that this says its to treat moss. It says nothing about
algae.
I hope that it works But I fear it may not




In the first link I gave (random listing) it says

Quote:

Used in fungicidal products to kill fungus, mould and algae.

I have personal experience of it effectively clearing a plastic roof of
a thick film of green algae.

From
https://hlssupplies.co.uk/bac50-biocide-blog

"BAC50 is used for removing algae, moss and mould and preventing
regrowth. This BAC50 solution is a professional grade and is still
effective in dilutions up to 1%. We recommend a finished solution
between 2.5% and 5% (Depending on the substrate being treated)"

Good. Now will it clear black algae? I have no problem clearing green
and red algae and moss with a pressure washer...


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