I have 3 cycled tanks using Penguin bio-wheel or similar type systems, that use the filter cartridges with built in activated carbon. I've heard from many sources that replacing filter cartridges is a waste of money and that I only need to rinse the cartirdges in tank water to clear it of debri once a month.
So does it matter that the carbon is essentially moot after two weeks? Is it really important for tank health? I also heard that the carbon that's left in for so long can actually be *bad* for the tank, is this true?
I really don't want to have to spend money on new filter cartridges every month, and I only recently was told that getting rid of the old carbon is important, and so is bringing in new carbon.
Any of you who use Penguin filters or eclipse set ups, what do you do?
So does it matter that the carbon is essentially moot after two weeks? Is it really important for tank health? I also heard that the carbon that's left in for so long can actually be *bad* for the tank, is this true?
I really don't want to have to spend money on new filter cartridges every month, and I only recently was told that getting rid of the old carbon is important, and so is bringing in new carbon.
Any of you who use Penguin filters or eclipse set ups, what do you do?