Hey guys... I just recently set up my 55g... I put 2 little bags of gravel from my other established tanks in it. Its about 4 days old. I saw an ammonia spike of 1.0ppm but this morning its 0, and no sign of nitrite... Now I'm still new to cycling tanks but I'd say its cycled no? On the other hand, I keep telling myself that's not possible. I'm using API liquid test kits. Can anyone tell me what's going on?