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natural bacterial biomes in rainwater tanks

 
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Location: On a Farm
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So I've heard and read a few things now about rainwater tanks forming their own bacterial(?) layer that filters the water naturally if left undisturbed at the bottom of the tank. Does anyone have more info on this or know where I might find research done on this? As in everything else, the older I get the more I find that nature takes care of itself if we only get out of the way.
 
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Hi Bernie.

It would have had to take care of itself, though, right? At one point, we were (and some would say still are) only creatively destructive animals with a penchant for tool use.

I think the key is to observe and gather information, and to decide where it is best to leave things alone, and where we can put in a tiny bit of effort to make natural systems' output benefit us the more, like with food forests.

-CK
 
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Generally speaking water in tanks will clean itself if the tank has a couple of months supply of water as its volume.
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