So I have an HOB filter on my 20G, and my tank is fully cycled. Every month, I rinse the filter cartridge in tank water. Today, when I did, the cartridge started completely dissolving into the water! I tried putting a new cartridge into my HOB behind the existing cartridge so it can catch some of the BB and get it going, but it's so tight that the new cartridge started tearing open as I did so, releasing even more filter media. If I were to throw out my existing dissolving filter cartridge and put it a brand new cartridge, would dumping in a bottle of TSS prevent a new cycle? What is my best course of action here?