Mould on liquid concrete

I heard Shannon Lush recommend Hy-Clor Longlife Algaecide with copper to brush on concrete and limestone for algae removal. She said 2 tablespoons of powder in a bucket of water.
I bought the liquid version.
Q1. Do you agree with her recommendation?
Q2. If so, how much liquid perbucket of water (~9 litres) should I use?

25020cookie-checkMould on liquid concrete

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