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Restoring BB after water change


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Is there that much bacteria lost from a water change. I was always under the impression most of it was on surfaces not the water column? In any event I use Bacter AE with some regularity meaning when I remember.

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99% of bacteria are in the soil and on other surfaces. No need to replenish after water changes. Anyway, most bacteria have very short generation times, between 20 minutes to a few hours. A problem after big water changes could be the altered chemistry of the water, pH, minerals, trace elements etc. This could affect the bacteria in your tank.

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