Hi everyone! I have a question related to the nitrogen cycle. When I read that during the nitrogen cycle, the ammonia in the tank will spike, what exactly does this mean? Does it mean that the ammonia will gradually increase over several days or weeks? Does it mean that the ammonia will increase rapidly, say overnight go from 0 ppm to 4 ppm? Does spike mean it hit a certain ppm, e.g. 4.0 ppm? Is the same definition of spike used when describing the nitrite and nitrate spike. Someone please explain exactly what this means and what I should be looking for. Thanks.