What Are The Key Signs Of A Faulty Aquarium Filter

To ensure that your fishes will be in a healthy condition, it is important that you ensure that your aquarium filter is in the best condition. It is important to regularly evaluate the condition of your aquarium filter. Understanding these signs in your filter will help you take preventive measures.

About water filtration

The main objective of the fish tank filter is to clean the aquarium water in different ways i.e. chemical, biological and mechanical ways. By installing multiple filters on your aquarium tank will surely give you the best outcome and provides backup at times of an equipment failure.

What are the signs of pure water?

Water in the aquarium filter has to be pure. It has to have the below mentioned signs:

  • At the right temperature
  • Free from the byproducts obtained from waste material decay and waste materials
  • It should have the appropriate balance of alkalinity and acidity
  • Free from any destructive chemicals such as ammonia, chlorine and airborne contaminants
  • It should provide water stability that is required by your fish.

Understanding filtration

There are three different types of aquarium filtration that can be used to perform water filtration. You can select a filter depending on the usage.

  • They drain off actual particle like uneaten food.
  • The activated charcoal eliminates toxic substances like airborne contaminants
  • Products motivate the advancement of bacteria that processes nitrite and ammonia and convert materials to harmless nitrate.

Indication of a faulty water filtration

Water clouded by small particulate matter is a sign that the motorized portion of the filter is not working. You can evaluate whether the chemical and biological filters are working properly by performing water testing with easy to use water testing kits. Watch out for a few elements:

  • Ammonia: Decaying organic matter and fish waste disintegrate into ammonia. This can be highly toxic to the fish.
  • Nitrite is formed when the ammonia in the water breaks down by the filtration system. As the filter matures, levels of nitrite increase while the levels of ammonia decrease. This is a good indication that tells that aquarium is getting stabilized. It is now becoming a healthy, and fish friendly environment.
  • After some weeks, the levels of ammonia as well as nitrite should drop down close to zero. This implies that your aquarium filter has attained the required efficiency level. When this stage is reached, it is required to test for nitrate. The only method to reduce nitrite levels is by modifying a small portion of the water in the aquarium.
  • pH: For most of the freshwater aquariums, the commonest type of water test required is for pH. The balance between alkalinity and acidity of water is measured in the form of pH. An average aquarium has a pH of 7.0. It is considered to be the ideal balance between alkalinity and acidity.


Maintaining the filter of an aquarium is a very essential part in keeping the equipment in the best running condition. Learning about the above signs and taking proper measures will keep your filter in the best working state.

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