fluvals

I use 305s and 405s on all my tanks and have a few extras from previous tanks. I've never had any issues with these filters. However, in two filters, the flow has significantly reduced. I've cleaned the filter media and checked the intake strainers without it significantly helping. So my...

Would anyone know if poret can be used as a substitute/replacement for the 6 foam pads? would this work or cause a clogging issue? im curious but dont want to cause a problem or have to clean the fx5 more frequently.