Planted Tank Guru
Join Date: Nov 2009
Location: Missouri united states
Yep,,despite out best effort's at maintaining a clean environment ,I am alway's a bit surprised at how dirty the filter material can get in just a few week's.
Is why I often suggest monthly cleaning of the material.
After a few week's,you can tell by looking at how much dirt is washed from the media as to frequency or interim in between cleaning of the media you might want to adopt.
This goes double for those with soil based tank's.
Don't take much dirt to reduce flow from the filter considerably and what used to be enough flow to keep the suspended particulates in the water column for the filter to trap ,then just fall's to the substrate due to lack of flow through dirty filter.
Plant's might use some of this organic matter and depending on how much there is ,,Algae will too.