Thread: High nitrites
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Old 01/23/2020, 01:27 PM   #13
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Join Date: Sep 2003
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Originally Posted by ohashimz View Post
- Once you add skimmer you start reducing bacterial population (skimmer remove 90% of the bacterial population in tank compared to natural sea water)
Thats a bit of a misleading statement.

A skimmer has been shown to remove up to ~90% of bacteria in the water column.
Total bacterial counts are FAR greater on the surfaces of a tank (on and in rocks/glass/sand,etc...) than in the water column.
While you may remove 90% of water column bacteria you may only reduce the total bacterial counts by a very small percentage.

Thats why one can typically eliminate the cycling process by utilizing "live rock" from an existing system. The same cannot be said by utilizing just the water from an existing system.

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