- Joined
- Sep 20, 2020
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- 27
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I tried a new algacide for my small pond but big waterfall. The algacide is purple in color. I missed calculated on the amount to add and added about 5 times more than I should have. Now all the rocks on my waterfall are colored blue. Curiously, the cement bottom and sides of the pond are not stained blue, only the large rocks on the waterfall. Is there any way to clean the rocks? The agacide I used was Cutrine Plus. Any suggestions?