Originally Posted by jwhitehorn
I was just about to take the rubble out of my cannister? Now I"m confused? It will or won't help?
yes it will help. bacteria will grow on the rubble to process nitrogen, acting as a biological filter. also, larger particles will be trapped in the rubble. the same as bio-balls, but better in my opinion. bioballs and rubble need to be rinsed with water from the tank every so often to remove excess waste from them.