Originally Posted by Hallyx
That advice was just wrong. The filter media contain the nitrifying bacteria which remove ammonia. They are heat and cold sensitive. They can also be killed or seriously reduced by chlorine or chloramine in tapwater. So you can see that that advice was inappropriate. By replacing your media regularly, you throw away all that valuable bacteria, which can damage or destroy your cycle.
Double-edge is fine if you feel safe using it.
There is nitrifying bacteria in the gravel/sand/substrate. Drying out kills them.
Oh, so what is the approaite way to clean it when it is turning brown?
How often do you recommand replacing it?
I always figured cleaning should happen in cycles, such as clean the rocks 1 week and the filter the next to avoid killing the BB. Is this the correct method?
Oh double edge isn't what I ment, my personal razor has like 3-4 blades cuz you said singel razor.
Oh, I have these like glass beads. I normally take them out twice montly and rinse them in warm water, this is also a bad idea? (twice montly I do a 100% water change to get all the built of poo and other stuff out of the bottom.)