I'm going to stick this here, because fact is I am new to fishless cycling. I had my HOB cycled, I squeezed the filter media onto my sponge filter and left the filter media touching the sponge filter. My whole cycle (the bacteria) has crashed. I had a massive amount of ammonia in my aquarium (not quite sure how, but I do) and so I have removed the dead seed and done a 50% water change which has brought the ammonia down to 1ppm (it was like over 5ppm before). Now the water is cloudy. I've left the 1ppm to try and trigger the sponge filter to build bacteria. I've never done this fishless or ever changed a filter over like this so it's completely thrown me back. 2 months of work down the drain in one weekend. The HOB and sponge filter were running side by side for 2 weeks and considering I was keeping the filter media in there I wasn't expecting it to crash this badly. Do I just start the cycle from scratch?There are bits everywhere from the HOB filter media, do I leave it or do I vac it out?