Keep the filter running, but permanently remove the carbon, if you are using it. Many planted tank owners don't use carbon. Carbon will absorb and hold many (not all) of the ingredients of fert's. It will also absorb some of the vital and helpful trace metals the plants and fish need. It also absorbs harmful metals. A Catch-22. Oh, and carbon can remove CO2 from the water, fighting the injection we work so hard to achieve.
Remove the carbon, but maybe replace it with a pad that can remove ONLY phenols, which is what gives aquarium water its bad smell.
Last edited by Mark13; 09-12-2014 at 08:38 AM.
Reason: Added info.