White cloudy water.

[Promisedsin]

I recently had to replace my filter and 2 days after a white powdery substance started to form on the bottom in the corner opposite of the filter. The next day the entire water was cloudy white. I vacuumed up the stuff on the sand but the next day it was back even worse. Can anyone help me with what this is and how to fix it?

 

[jsoong]

White cloudy water is usually a bacterial bloom ... perhaps you disturbed your bio-filter with the filter change. <Did you keeep the old filter media to seed the new filter?> anyway, check the water parameters, that might give a clue as to what is going on.

 

[BigJim]

+1 for the bacteria bloom.

Did you replace all your media when you replaced the filter? If so, you lost the majority of your beneficial bacteria, which results in a lot of unhandled ammonia in your tank. This ammonia causes the remaining bacteria to reproduce rapidly, clouding up your tank. Check your water parameters.

 

[Promisedsin]

My water parameters are all in check. I seeded the new filter.