You don't need to do anything further except let the Wet and Forget do it's thing. This is not immediate and also is determined by the amount of moss present Next spring you should see a difference. I apply bleach (the blue container) diluted somewhat. Later I apply the Wet and Forget. I have not had to reapply for 2 years so far.
Good luck.
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am a retired workaholic and continuing aquaholic
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