How to Keep Fish Tanks Clean

There are many different sizes of fish tanks but no matter which one you have one thing you will need to do is ensure it is cleaned regularly. There are various steps involved in the cleaning process.

By following these, you can ensure that your fish tank is clean and healthy for your fish.

First off, it is worth noting that a number of factors can contribute towards how often your fish tank needs cleaning. Some of the factors that can have an impact upon this include:

The size of the tank: You can purchase tanks in a range of sizes. However, the smaller ones are likely to need cleaning more regularly than larger ones. With larger ones, there is more water volume. Waste, chemicals, and debris are therefore spread over a far larger area than with a smaller tank.

How much and often you feed your fish: You should avoid the temptation to feed your fish too much or too often. This is because it will result in more unconsumed food in the water, which can cause pollution. Below is a video reference that explains the feeding frequency and the effects:

The number of fish: The number of fish you have in the tank will also impact on how often you need to clean it. If there are too many fish in the tank then you will have excessive food particles, waste, and chemicals, resulting in the need to clean more often.

You should make sure that your tank is not overcrowded and that you do not feed your fish excessively. This can help to keep the tank cleaner for longer.

Cleaning your fish tank

When it comes to cleaning your fish tank, you can follow a series of steps. This should help to ensure that the tank is kept clean and safe for your fish.

First off, clean the algae build-up from the tank using an algae magnet or scraper. Also, if you have any plants in the tank, remove any dead leaves that may be on them. Remove all of the algae that is sticking to the tank and make sure that you avoid using standard sponges or scrubbers from your kitchen to do this. If you prefer, you can leave this step until after you have siphoned off water from the tank and before you replace it with fresh water.

You then need to remove any large pieces of debris from the surface with the use of a siphon hose. Make sure you have a bucket to hand, as you will then need to siphon off around 15 percent of the water from the tank into the bucket. If any of the fish are sick, you may need to remove more of the water – around 25-50 percent.

Use a gravel vacuum to then remove debris, waste, particles, and excess food from the gravel to get it clean. If you have sand substrate, you should just use the hose section of the siphon and hover it an inch or so above the surface so that the debris and waste get sucked up without causing any disturbance.

You should also make sure that you take the time to clean any decorations that you have in the tank. You can simply use an algae pad to run over the decorations in order to get them clean.

Once this is done, you should replace the siphoned water with clean water from the tap, which has been treated for chlorine. The temperature of the water you add should be the same as that of the water in the tank to ensure the health of the fish. If you want to be sure, simply use a thermometer to check that the temperature of the water you are adding is the same as that already left in the tank.

You then need to clean the glass on the outside. You should spray some window cleaner onto a clean cloth. Make sure you spray this away from the tank so it doesn’t get into the water. Rub the sprayed clothed over the exterior glass areas of the tank. You can also get special aquarium safe glass cleaners that you can use in order to clean the outside of the tank.


As a rule of thumb, you should clean out your fish tank every week. Of course, you may not need to do all of the tasks each week. For instance, you won’t necessarily have to clean the decorations inside the tank each week.

You also need to ensure you change the cartridge of your aquarium filter once a month as otherwise the carbon inside the filter could prove harmful to your fish.

Making sure you follow the instructions for cleaning your fish tank and that you do it on a regular basis, will help to ensure your fish are safe and healthy.