So I have been trying to cycle my tank for nineteen days now. I have a ten gallon with a filter, one betta, and a moss ball. Every time the ammonia reads .25 ppm I do a 50% change. There are only two days I have not tested the water, so I am very on top of the readings. I test ammonia every day, and am increasing nitrite tests to every day, since I know that is what is supposed to spike next. But, I have NEVER had a nitrite reading, it's always been 0. So is my cycle just taking a long time, or is something wrong?