Have you tested your Tap water? Ever calibrate your test kits before? if not any reading you take really isnt very trustworthy.
Sounds to me like you have more then one issue. The cloudiness in the tank is most likely a Bacteria bloom happening. It can happen. Is this a planted tank? If not when you do the water change are you removing any decor and doing a nice substrate cleaning good and deep? If not this could be another cause for Nitrates. Your Tap water could even have Nitrates. .25 for Ammonia isnt to big or crazy. if your getting Nitrates that tells me the Nitrites are being converted. Keep doing water changes of 50% use the prime as per directed for a water change. Make sure to remove any bad organics from the substrate. The cloudiness should pass when the Ammonia goes to zero.
one last thought..... Make sure no chemical airborne contaminates have been near the tank. If there has been this could explain everything.
Sounds to me like you have more then one issue. The cloudiness in the tank is most likely a Bacteria bloom happening. It can happen. Is this a planted tank? If not when you do the water change are you removing any decor and doing a nice substrate cleaning good and deep? If not this could be another cause for Nitrates. Your Tap water could even have Nitrates. .25 for Ammonia isnt to big or crazy. if your getting Nitrates that tells me the Nitrites are being converted. Keep doing water changes of 50% use the prime as per directed for a water change. Make sure to remove any bad organics from the substrate. The cloudiness should pass when the Ammonia goes to zero.
one last thought..... Make sure no chemical airborne contaminates have been near the tank. If there has been this could explain everything.