I just took out the sponges from my Fluval U2 internal filter yesterday. Please comment. Thanks
I took out the ceramic media quite a long time ago. The idea was that the less media, the more bb in the tank. I think this reflects nature more.Why'd you take em out? What do you want to know?
Is there no media at all? Or did you just remove the sponges and there is still some other biomedia?
With no media to house nitrifying bacteria, you pretty much just got a power head.
Without the cycled media (colonized with nitrifying bacteria), you pretty much just stopped the "cycle", so you don't have any (barely) nitrifying bacteria to deal with the ammonia and nitrites, so they can build to dangerous levels and kill inhabitants.