Hi All, So I'm new to the forum, but I have been doing a lot of research to learn how to start/cycle my tank and have been following the information I found to help me in cycling my 50gal Tank. I have not detected any Nitrite, Nitrate levels, and call me crazy but I feel my ammonia was going down, and it no longer is and I'm really not sure as to how to proceed! I think I may have ruined it And if so, I don't know how to fix it. I recently bought a 50g brand new tank. Filter: Penn-Plax Cascade 1000 Canister Filter (for upto 100gal), 265GPH Thermometer: Aquatop GH-300W Aquarium Glass Submersible Heater, 300-Watt AirPump: Tetra 77855 Whisper Air Pump (for 100gal) 1. As per the info, I did the full tank setup, rocks/plants/etc 2. Added my airpump and it's turned up high. My temperature sits at around 28C. 3. My filter has carbon packs (the black stones), those biorings for bacteria growth, regular sponges (black ones and white ones) 4. I went to a specialized fish store in town and they took a sponge from their goldfish filter, they squeezed it into a bag, and that's my seeding material. 5. I also added 1 1.5-2" moss ball to my tank. 6. I bought pure ammonia, to make sure I shook the beejeezzzus out of it and it was like water (no bubbles etc), the bottle also says it's pure ammonia, no fragrances, etc. etc. 7. I added a pinch of fish food to my tank. 8. Filled up the tank and added dechlorinator Nutrafin AQUAPLUS (Tap Water Conditioner) as per the specifications. 9. I also added Nutrafin CYCLE - The fish store manager told me it was necessary, and it wasn't until later on that I read some information, that it sort of contraindicated that so I'm not sure if that is my problem? 10. I started everything and the tank ran. Ammonia Levels: June 3 - Tank Started, added ammonia to 1ppm. Then 2hrs later added ammonia to 4-5ppm. Added some fish food too. Starting Levels: pH 7.4-7.6, Ammonia 0ppm, Nitrite 0ppm, Nitrate 5ppm. June 4 - 4ppm June 5 - 4ppm June 6 - 2ppm (Added 1.5ml Ammonia = ~0.25ppm) I was afraid the ammonia would drop to 0. June 7 - 2ppm (Added 1ml Ammonia) June 8 - 2ppm (Added 1.5ml Ammonia) June 8 Levels: pH 8.0, Ammonia 2ppm, Nitrite 0ppm, Nitrate 5ppm. ( I feel like things stopped here, perhaps because my pH is too high? ) June 9 - 2ppm (Added some fish food) June 10 - 2ppm (At this point I thought things had stopped so I did a 20% water change) For the water change, I emptied 20% water with a clean rinsed container, then I stopped the filter and closed its valves. I tested the current left over water: Nitrite 0ppm still. pH 8.2. I added 20% water from the tap using a brand new hose, and I also added Nutrafin AQUAPLUS tap water conditioner as per specifications. This time I didn't add Nutrafin CYCLE. I waited about 30mins for the water conditioner to do its thing (afraid of killing my bacterias) THEN I started my filter again and resumed running the tank. I added 5ml ammonia = ~1.2ppm June 11 - 2ppm (Added more fish food) June 12 - 2ppm June 13 - 2ppm ( I accidently added 25mL Nutrafin CYCLE thinking it was AQUAPLUS tap water conditioner ) June 14 - 2ppm June 14 Levels: Ammonia 2ppm, Nitrite 0ppm, Nitrate 5ppm, pH 8-8.2 (See Image) June 15: Same as June 14 So that's where I am at, I haven't added ammonia, I'm waiting for it to drop to 0.5ppm or 0.25ppm so at least I know it's working... pH hasn't changed, ammonia hasn't changed, nitrite hasn't changed, nitrate hasn't changed!!! But I don't know how to proceed. So my questions are: Did I ruin my cycle by using nutrafin CYCLE? Should I do a 75% water change because of it and start over or a bigger %???? Did I make any other mistakes along the way? What are your suggestions and how should I proceed? Any guidance greatly appreciated!!