Will I end up starting a new cycle?

  • We are currently upgrading MFK. thanks! -neo
What filtration system are we talking about here?
 
Type of filter....
 
It will be fine.

Change the substrate then feed less or none at all if possible for a good week or two and do WC's like normal and you will be fine.
 
Should be fine since most of the BB SHOULD be established on the bio wheel
 
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