Cloudy Water could indicate one of a few things
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Cloudy water indicates bad bacteria, however, there are many reasons for it. The fish may have recently spawned. Spawning causes a temporary cloud in the water, although, the cloud is short lived
When a cloud comes and doesn’t go away; the pump isn’t delivering enough of the right kind of action
What causes cloudy water?
Yellowish or greenish colored clouds are caused by algae forming in a new set up; called an algae bloom. Algae forms as the nitrogen cycle completes and nitrate levels climb. If there’s not enough water movement, algae continues to float freely in the water; deepening in color and consistency; called green water algae
Fish water cloudy
Water rich in oxygen destroys the bad bacteria that cloud water
Waste is heavy and settles to the bottom of the tank in a short time. We use a gravel vacuum to remove accumulated waste and sponges to collect what the vacuum doesn’t. Goldfish waste is easily stirred up by their search for food. This causes a cloud in the water, however, only for a short while. These types of clouds are typically close to the same color as the food that the fish are being fed
Is cloudy water dangerous to goldfish?
Clouded water indicates oxygen levels are low. You may see the fish at the surface gasping for air; not good
Supersaturated gases are concentrated amounts of oxygen found in tap water. These tiny bubbles float freely in the water causing a cloud, however, they also cling to the decorations; gravel; tank walls and even worse….your goldfish
Eliminating white clouds
Increase the action of water and in the process, discourage clouds. Expose the surface water to fresh air by removing the top. Wrap thick sponges around the intakes of your pond pumps. Rinse the sponges with every water change. No matter the cause of a cloud, the proper set up and maintenance will eliminate it
White clouds are caused by bad bacteria free floating in the water. We call this a bacteria bloom as seen in the photo
Notice the insignificant amount of surface movement; the water almost stagnant