Ok maybe I can try something new here. I’m not going to tell you anything about my tank or my fish, because I don’t want it to influence your response at all. Can you guys list all the reasons you can think of for why a cycle (in any tank) would stall for a long period of time or what can prevent a cycle from completing? If you have been following my threads, don’t even think about my situation at all. I’m encouraging any and all ideas, even if you think it’s irrelevant to me. Even if it has nothing to do with freshwater fish. Literally whatever you got. I’m hoping if enough reasons are mentioned, something will click for me. For example, refilling the water in your filters after a water change with chlorinated tap water. You are all so intelligent. And when it comes to fishkeeping, I’m clearly not. And that’s putting it nicely. So please help me and list everything you can think of. Thank you!