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Bad bacteria questions.
We are all familiar with the 'good' bacteria that we try to cultivate in
filters and gravel etc. but where do the 'bad' bacteria lurk ? How do we distinguish between 'good' and 'bad'? Are they in the dead algae that is killed off by the uv light which then appears to accumulate on the rocks and bottom ? Is that the black slime that appears on the rocks? How do we get rid of the 'bad' boys ? Do we need to? Les. |