Everyone wants a crystal clear marine aquarium to showcase their saltwater fish.
But sometimes the opposite happens and your water appears cloudy and dirty.
Most of the time you can trace this to to much debris in the water.
This can happen for a variety of reasons but the common causes are as follows: Common Reasons For Cloudy Saltwater Aquariums

• The aquarium owner stirred up the debris that was settled in the gravel beds during routine maintenance
• There is a fish that likes to dig or burrow in the gravel or sand causes fine particles to be dispersed into the water column.
  
• The marine aquarium owner used very fine sand that is being blown around by the water current in the tank
• You have under powered filters and may need to increase the size of your filters

In most cases the cloudiness will disappear on its own and you will not have to do much to get your marine tank clear again.
But sometimes it is not dirt that is causing the cloudy look to the water.
Sometimes it can be a bacterial bloom in the water that was brought about by a wide variety of reasons.
How You Can Get Your Aquarium Water Crystal Clear Again But if you are unable to get your water to clear up in a few days you may need to take some action.
To combat a cloudy saltwater aquarium try the following.

• Change 30% of the tanks water with saltwater that is the same temperature and salinity as your aquariums water.
  
• Change and replace all filter pad material and replace any activated carbon you maybe using
• Reduce the amount of fish food you add to the tank

If these steps do not clear up your saltwater fish tank you may want to try one ofthe readily available marine tank clarifiers on the market, just make sure to follow the directions on the bottle when adding them to your tank.