Hi! I've been cycling with fish food for more than two weeks now and I'm aware that it can take a loooooong time to establish a cycle (Ammonia had stable readings, Nitrites were going up and so were nitrates) Everything was going as it should, but I, unfortunately, had a family emergency and had to leave for a few days, leaving my tank unattended. I just came back, tested for nitrates, nitrites and ammonia with my API test kit and I think I'm stalled : ammonia levels read at around 4-6 ppm , no nitrites, no nitrates). Plus, my tank is cloudy, fish food is rotting and making the water smelly. I do have a water heater on (77F). PH is about 6,4. What should I do?