Hello, I am currently cycling a 55 gallon tank. Currently the tank just contains Pool Filter Sand and various rocks. The tank has been cycling for approximately 3 weeks with regular doses of Seachem Stability. At the moment the ammonia is at 0 PPM, however the nitrites are at 2.0 PPM and the nitrates are at 160 PPM. The water is also very cloudy. At this point should I leave the tank alone and see if both the nitrites and nitrates naturally come down? Or should I perform a water change? Your tips are much appreciated, thank you in advance.