Starting a new 36 gallon tank and trying to perform a fishless cycle. I have an aqueon quiet flow HOB filter, some decorations, 2 heaters, gravel, and an air wand setup. I am on day 9 and my ammonia hasnt budged. I started by adding Prime to tap water and cycling for for a couple of hours, then I added roughly 5mls (calculated from online calculator to equal 4ppm ammonia) of ACE Hardwares 10% ammonium hydroxide solution (janitorial strength). Tank water before spike was 0ppm for amm, nitrite, and nitrate. Slight pH increse to just over 8 with the amm hydroxide. After a couple of days of nothing, I decided do roughly a 10 gallon water change in which Aqueon water conditioner was used before adding water to tank. I kind of believed that my ammonia may have been too high. This did drop ammonia levels a little but the color chart (API master kit) is hard to read but I believe my ammonia to be just shy of 4ppm and has been holding here since (pH back to neutral). After the water change I did add an entire bottle of tetra safe start to see if this bacteria may jump start the process. Day 7 with nothing happening I was able to go to LFS and get some gravel from established tanks which I split up in womens leggins and put one in tank and one in filter. For days 1-6 water temp was steady at 78F (preset heater with no adjustment), while day 7 a second larger heater was added and now water temp is holding around 88F. After adding the gravel, I did get a spike in nitrates that I believe to be from some water that made its way into the tank from the bag of gravel from LFS. Right now ammonia still hasnt dropped (holding around 4ppm), nitrites are 0, and nitrates are around 5ppm. Any ideas or suggestions as to why nothing is happening!