{"id":2117,"date":"2016-05-20T15:52:00","date_gmt":"2016-05-20T22:52:00","guid":{"rendered":"http:\/\/www.puravidaaquatic.com\/wordpress\/?p=2117"},"modified":"2016-05-25T11:41:26","modified_gmt":"2016-05-25T18:41:26","slug":"optical-density","status":"publish","type":"post","link":"https:\/\/www.puravidaaquatic.com\/wordpress\/optical-density\/","title":{"rendered":"Optical density"},"content":{"rendered":"

Most of the time when people talk about optical density they are talking about laboratory results using a spectrophotometer and glass cuvettes, and measuring the light passing through a one-centimeter lightpath. But it certainly also applies in the real world to larger systems. A month ago at this pool I could put in a swimming pool net with a yellow rim and watch it disappear within the first four inches. It was green!<\/p>\n

\nBut, just a reminder, if the water is not toxic to the point where algae will grow, it is likely to be far less toxic to us. Today I went “prepared” because the client had sent me a surprised email that it was clearing up! The net in the first picture is about 8 feet down.
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The next picture is 4 feet down in the shallow end. You can clearly see the bottom.<\/p>\n

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The last picture is showing that the pool still looks somewhat green but it is definitely clearing up.<\/p>\n

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Every two fold difference that I can see through the water is equal to 50% of the current biomass being removed. So when the pool went from 4 to 8 inches that was the first 50% of the algae biomass removed. 16 inches another 50% of the 50% that is still remaining (or three-quarters of the original amount – 75% total) of the biomass removed. 32 inches=50%+25%+12.5% (87.5%) 64inches=94% removed in two weeks! With absolutely no toxins.<\/p>\n

\nBob<\/p>\n

\nwww.PuraVidaAquatic.com<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

Most of the time when people talk about optical density they are talking about laboratory results using a spectrophotometer and glass cuvettes, and measuring the light passing through a one-centimeter lightpath. But it certainly also applies in the real world … Continue reading →<\/span><\/a><\/p>\n

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