Hello everyone, I really need some help. About 3 months ago, I decided to completely re-scape my 20 long with new plants, hardscape, and substrate while keeping the fish I already had. I removed my fish, emptied the tank, and started over. The tank came out really nice but it's been problematic.
I knew that I would run the risk of completely losing my cycle if I did this, so I made sure to re-use the same 2 filters (and I didn't clean them so they were still nice and dirty and covered in bacteria) from before, I re-used some of the plants from the previous setup, I re-used a couple of the rocks from the previous setup, and I re-used about half of the water too. I took as many steps as I could to ensure that I would be carrying over as much of my cycle as possible, and even added bottled bacteria just to be sure.
The new tank has a ton of new plants that have been growing extremely well, and it has more surfaces than my previous setup did for bacteria to grow on. There was an algae bloom during the first couple weeks of the new setup and I cleaned up most of it but I still left a good amount of the algae alone.
My problem is that every time I test the water the ammonia is always around 2.0 ppm, and the Nitrite and Nitrate always sits at 0. the pH of the water is between 6.0 and 6.4. The tank is currently stocked with:
6 Black Phantom Tetras
6 Skunk Corydoras
1 Honey Gourami
3 Nerite Snails
None of my fish appear to be in poor health due to the water quality, thankfully, but I don't know what to do anymore. Initially, I tried doing 25-40% water changes every other day, but the ammonia would always rise again the next day. Then, I tried waiting around a week between water changes to see if that would help (but not any longer since I don't want my fish to be swimming in 2.0 ppm ammonia water for too long) and that didn't work either. I added an entire brand new bottle of bacteria over the course of a two weeks, and it made no difference. I always use water conditioner (Prime and sometimes Stress Coat) when I add water to the tank.
I'm at a complete loss. I did my homework and took steps to ensure that I was doing everything right and I just have absolutely no idea what the problem can be. I'm thinking that maybe the plants have something to do with it but I couldn't find any answers anywhere. I would really appreciate some advice, I feel so bad having my fish swim around in such ammonia-filled water at all hours of the day.