How To Lower PH In Aquarium: Everything You Need To Know

April 22, 2017

Aquariums are excellent to keep in your home. A lot of people want to look around fishes after a stressful day. But, your fish usually dies off when the pH of the water is off. Then, you may be wondering how to lower the pH in aquarium.

Depending on the kind of fish you choose, the pH levels of the tank need to maintain a particular range. Or else the fish will end up dying. So, let’s talk about the ways to decrease the pH level of the reservoir.


Decorations and Substrate Problems in the Tank

When you replace the gravel in your reservoir, it may cause certain alterations in the pH levels. There are a lot of various types of gravel. So, ensure that you have the right kind of the kind of fish you have.

For instance, if you have crushed coral, you can use it in a marine aquarium for fishes which love higher levels of pH. Also, make sure that you have the correct types of decors for your tank.

Filter and Water Source Setbacks

When you replace the water in your aquarium, you are changing the pH level of your tank. If you utilize a variety of water sources or replace the filter, the pH of the aquarium will alter significantly.

The factor here is to use a little amount of chemical in the water. You must also be cautious enough even on tank-specific substances.

Different Ways to Lower the pH of Your Tank

Fortunately, there are so many ways to alter the pH of your aquarium. An excellent way to change it is through the use of a natural method. Chemicals may modify the pH level from an introduction of chemicals.

But, they may alter the pH drastically, which may lead to some diseases or even death of the fishes. Moreover, the natural way is also simple to use.

Plus, it does not require harsh chemicals and won’t harm the marine life. Here are some ways to alter the pH level of the tank:


You have to add a piece of driftwood to the aquarium to slowly lower down the pH levels. However, it is an ideal way to color your tank’s water. To avoid that, experts suggest that you have to soak your wood in a different container for at least two weeks.

Later on, you have to introduce the driftwood in the tank or boil it to make it sterile.

The wood will act as a filter for the reservoir water as similar as the leaves filter the air. Also, the trees will function as a standard filter for contaminants. The pollutants in the water increase the pH value in your aquarium.

Peat Moss

You can also use a peat moss to help you filter the pH values in your tank naturally. However, it may leave a discoloration in the water. A lot of experts suggest that you pre-treat your peat moss in a different container for a few days.

Then, after that period, you can place it into your reservoir to dissolve the yellowish color of the peat.

Furthermore, you can add the peat on the filter in chunks and pellets that you can buy at a pet store. That way, you can lower down the pH level by working as a second filter.

You have to place them into a filter bag. The natural moss pellets may lower down the pH levels over time. So, if you are applying a weekly water replacement, you may not observe much difference.

Also, you can experiment to determine the exact amount of peat for your tank to reach the optimum level of pH.

Almond or Catappa Leaves

Catappa is a kind of Indian Almond leaf that works as a water conditioner. Also, it softens and lowers the pH of the water. Almond leaves may also give off tannins in the water.

So, you have to soak them to obtain the color leakage before adding the leaves to the tank. But, the color variations may be subtle enough, especially to colored tannins in the water.

Moreover, Catappa will help you bring down the pH lower in your tank. It can filter the water contaminants found in your reservoir too. Many also believe that almond leaves may work as a health aid for fishes.

Some may even prevent and cure diseases as they work as anti-inflammatory and antioxidant agents.

Almond leaves may also be a perfect aesthetic property to the reservoir, especially for marine life that usually lives in rivers, lakes, and seas. Also, they may use them as a natural hiding area.

RO Water

Reverse Osmosis or RO water is a method of purifying the water that involves the usage of a semi-permeable membrane. You have to use it to get rid of the ions and molecules for softer and fresher water.

The filter will also enable the water and ions to pass through as you keep the large ions filtered out. It may even filter chlorine, lead, and other water contaminants quickly.

Furthermore, the Reverse Osmosis unit can help offer a stable and constant pH level. Also, it can filter up almost 99 percent of water pollutants.

Reverse Osmosis will also require occasional screen alterations. Also, for a long-term solution for hard tap water or unhappy fish, you can use the RO system.


So, whether you pick an artistic approach such as almond leaves and driftwood or filtering process like the RO system, you never have to fear using them. Rest assured, all of the methods stated above are natural ways to control the pH levels of your tank.

But still, you have to let us know if one of these methods may or may not work for you. You can leave a comment here or be sure to consult an expert to choose the best way to lower down the pH value of the aquarium.

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Hello, fishing world! My name is Bella. Yes, you got me right, I am a woman! But, I am a woman not only fond of cooking and shopping. I am a woman who shows interest in everything that covers topics regarding fishing. Don’t get me wrong! I believe that the world of fishing is not exclusively for men! In fact, I, myself enjoy fishing. That’s why I created this website.

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