SO I have no clue what to do with my HOB filter after reading so much about people accidentally restarting their cycles.(what the ****??? All my fishes sacrifice should not be in vain???) Should I replace the cartridge with a new one? Should I modify my filter and take out the cartridge altogether like in the YouTube videos and replace it with a sponge? Shouldn’t there be carbon in there though to help purify the water... Or is that just a precautionary step? I’m so lost !!!