Chemicals that are dangerous for your aquatic pets


Protecting our pets is also part of our duty when raising one. It is necessary to maintain their good condition to grow healthy, especially when presenting an aquatic pet, like fish. According to, one of the most complex animals to raise is a fish. Sometimes, people think they are happy and excited when a fish freely swims in the aquarium. But, on the contrary, there are some particular times when this motion is a sign that they are uncomfortable. 

Fish are also a magnet for harmful substances. Therefore, it immensely affects their everyday life negatively. Of course, they can show signs, but they will be visible in humans’ eyes when they focus on the fish. Thus, it needs more attention and action in case you discover it. Or worse, it can lead to death. 

Chemicals are one of the most dangerous substances that your fish might encounter. It is because it gives so much effect and hardship to them. But, unfortunately, each of them has a danger for all your pets inside your tank. 

To know more about the real deal of each substance on the list, keep on navigating this article. Join us to discover the effect of this compound on your fish pets. Then, let us move forward and get started!

Harmful Chemical Substances For Your Fish Pets

Since fish can help you relieve your stress, they also need you to make them safe from this kind of situation. Therefore, familiarizing each of these chemicals can significantly give you the knowledge to properly care for your fish. It includes the following;

  • Nitrite

Nitrite poisoning is shared among others. Thus, it is less toxic than ammonia. But, as we know, too much and too little of this can cause damage to your fish. In addition, it can affect your pet’s immune system and becomes prone to secondary diseases like ich, fin rot, and bacterial infection. Yes, that is right. Nitrite poisoning can do all of those and worse, leading them to die. 

Another damage that you must control is the liver, gills, and blood cells. On the other hand, as ammonia poisoning is the primary killer of aquarium fish, the level of nitrite increases when that happens. As a result, it risks the remaining fish and leads to an additional threat. 

Therefore, performing a test for the new setup of your aquarium is a great option to prevent that from happening. In addition, adding additional fish can help to establish the new environment inside. 

Also, did you know that nitrite poisoning is also called brown blood disease? Yes, that is true. The entering of nitrate in the fish’s bloodstream can cause them to turn their blood color into brown from increased methemoglobin. In addition, it renders the blood unable to carry oxygen, resulting in fish suffocation. 

  • Hydrogen Sulfide

This substance is triggered when there is a lack of maintenance in your tanks. And because of that, it is formed in the filter and the gravel. If that happens, there will be a restriction in oxygen absorption and increased respiratory stress of your fish that can cause suffocation.

Furthermore, when your aquarium has this kind of compound, one of the signs is having a rotten egg-like smell. It is an unpleasant odor that you might immediately detect. But, in addition, sitting at the water’s surface area where this substance sticks to. As a result, the fish will start to gasp for air and die slowly because of the absence of oxygen. 

Moreover, together with the other symptoms, your fish might experience lethargic swimming, flaring of fins, fading colors, red gills, and catatonic states at abnormal times. However, these symptoms are similar to other conditions. Therefore, sometimes it is hard to figure out why all these signs are happening. Either way is an alarming situation that needs a quick solution.

  • Chlorine/Chloramine

Unlike people who use chlorine to clean the water that they will use, this substance is hazardous for the fish. Tap water in your house is an example of a liquid that contains chloride. The effect of this compound is similar to nitrate poisoning. Both have severe damages that fish can get. 

Moreover, the irritated gills blockage of oxygen-carrying cells, leading to suffocations. Its actual odor smells like chlorine, making the fish gasp in the air. To neutralize the effect, you can add the conditioner beforehand. Thus chemicals can kill your fish within 24 hrs. 


We have come this far. Familiarizing yourself with each of these substances is a great advantage to avoid them as much as possible. In addition, the information above can serve as a great guideline to perform much action in preventing the chemicals from damaging your aquarium and harming your fish pets.

Thank you and Goodluck!

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