How to Keep Your Aquarium Water Crystal Clear

Clear aquarium water is a sign of a healthy habitat. Fish need clean water to live well and grow. Leftover food, fish waste, and debris from aquatic plants contribute to raising the pH level in the tank, making it unsafe for the fish. This article will guide you on how to keep your aquarium water clear and pristine.

Wait for the water to clear. Often, cloudy water will clear up naturally once the water environment stabilizes. Typically, cloudiness is caused by a mix of microorganisms like bacteria, protozoa, and multicellular organisms. These organisms come from fish, their food, and their waste. Generally, aquarium water will balance out and self-clean within about a week.

• Be patient. Before using chemicals or drastic measures to treat cloudy water, remember that your aquarium is full of microorganisms. You should identify the possible causes of the cloudiness before applying any treatments. Unnecessary chemicals and cleaners can disrupt the tank's environment and harm the fish.

Introducing beneficial bacteria. Adding beneficial bacteria to the aquarium helps enhance its natural filtration process over several days. You can purchase packaged bacteria at a pet store or get gravel that already contains these bacteria. Alternatively, you can introduce gravel, stones, driftwood, or filters from an established aquarium into yours. These items come with live bacteria attached to them.

• The bacteria will help neutralize harmful ammonia and nitrites, converting them into less harmful nitrates, which are then removed during the water's metabolic process. Nitrosomonas and Nitrobacter are the most effective bacteria for this task.
• To preserve the bacteria, avoid cleaning the filter core too often, and use tweezers to remove fish waste from it.

Choosing the right aquatic plants for your aquarium. Another method to keep aquarium water clean is by adding aquatic plants. These plants host beneficial bacteria and also help filter the water. You can purchase aquatic plants at your local pet shop.

Check if your filter is suitable. There are various types of aquarium filters, each designed for specific uses in your fish tank. Cloudy water could indicate that you're using an incompatible filter. Choose a filter based on the fish density, tank size, and whether you have live or artificial plants in your aquarium.

• There are three types of filters to choose from: Mechanical filters, which remove impurities by pushing water through materials that trap debris; Biological filters, which use bacteria to break down toxins into less harmful substances; and Chemical filters, which use chemicals to remove toxins or chemicals from the water.
• Choose the filter with the highest possible power, but remember that certain fish, such as bettas and gouramis, can't handle strong currents created by filters.

Consider carefully before adding fish to your tank. Avoid overcrowding your tank as this can cause health problems for the fish and make it more difficult to clean the tank. For goldfish, the general guideline is to provide 75 liters of water for the first fish and add 30 liters for each subsequent fish. Research the species you're interested in to determine the appropriate tank size needed.

Changing the aquarium water. The general rule is to change 20% of the water every week. If you’re using tap water, let it sit outside for 2 days. This will allow the chlorine to evaporate and bring the water temperature to room temperature, preventing any shock to the fish when you add it to the tank. Chlorine neutralizers can help eliminate chlorine and reduce stress for the fish. You can also add dechlorination chemicals to the water to prevent diseases.

• You can also buy a device that attaches to your tap to siphon out gravel while changing the water. This method eliminates the need to wait, but ensure the water temperature is similar to the tank's, and don't forget to add chlorine neutralizer.

Keeping the filter clean. Ensure that the filter is regularly replaced and functioning well. The filter plays a vital role in maintaining a healthy environment for your fish, so if it's not replaced or maintained properly, the water may become cloudy and even harm the fish. Follow the filter's instructions for proper maintenance.

• All filters need to be checked monthly and replaced when necessary. A weekly check is recommended to ensure the system isn't clogged or dirty. Clean or replace the filter as needed.
• When cleaning the filter core, use tweezers to remove fish waste and debris that might clog it. Avoid rinsing the core with water to preserve the bacteria that help break down ammonia and nitrites. The bacteria will appear brown when they develop in the filter.
• Read the pump's manual to ensure it's properly installed and functioning. The pump plays a crucial role in aerating and providing oxygen to the aquarium. Fish can be affected if the pump doesn't function properly, especially when the water is cloudy due to waste.

Be aware of bacterial blooms. After major changes in the aquarium, such as replacing a large volume of water, deep cleaning, or treating the fish with medication, a bacterial bloom may occur. Be patient if the water becomes cloudy due to these factors. The bacteria will balance out in a few days, and the water will naturally clear up.

Check the filter. If the filter isn’t working properly, the water may become cloudy. Filters contain bacteria that process byproducts such as ammonia and help maintain clean water. If the filter stops working, bacteria can build up in the water, causing cloudiness.

Adjusting the addition of new fish. When adding new fish to your aquarium, ensure that the tank can accommodate the extra load. For example, if you add large fish to a tank already populated with smaller fish, the filtration system may not be able to handle the increased load. In such cases, you should install an additional filtration system or reduce the number of fish in the tank.

Avoid overfeeding your fish. Overfeeding your fish can lead to cloudy water. Fish should only be fed the appropriate amount. You can feed them once a day with small portions and allow them to fast for one or two days each week.

Be cautious with decorations. Sometimes, cloudy water may be caused by decorative items in the tank. Be sure to thoroughly clean all decorations before adding them to the tank. Inspect them to ensure that they are designed for aquarium use and purchased from pet supply stores.

• Check for any peeling, warping, looseness, or discoloration of decorations.

Control algae growth. Green algae can accumulate on the walls of the aquarium and occasionally on decorations. Water changes are the best time to scrub algae off the tank walls. Use a soft plastic brush to gently scrape the walls, rinsing it in water before moving to another spot. Remove all decorations and clean them under running water.

• Avoid excessive lighting in the aquarium, as this can encourage algae growth. Do not place the tank near windows, and limit the light exposure to 10-12 hours per day.
• It is also crucial not to overfeed the fish, as leftover food can contribute to algae proliferation.

• Decaying organic matter is often the cause of bacterial blooms and cloudy water. Check to ensure there are no dead organisms in the tank.
• Avoid overcrowding the tank with too many fish; otherwise, it will be challenging to maintain clean water.
• Usually, cloudy water will clear up on its own. Be patient and wait for it to resolve.
• Ensure the filter and pump are installed according to the manufacturer's instructions.
• You may need to perform a thorough cleaning of the tank, including the gravel, filter, decorations, and a complete water change. However, this should only be done after trying all other methods first.