8 Effective Ways to Increase Aquarium pH

It’s critical to keep the pH of aquarium water in check. To flourish and live, fish and aquarium plants require a specific pH level. If the pH is too high or too low, it can cause a variety of issues in the aquarium, including the death of your fish.

In this post, you’ll learn about the proper pH levels for each type of aquarium, the causes and effects of imbalanced pH levels, and how to check for and correct any issues you might have.

I hope this information assists you in designing your ideal fish tank as a wonderful addition to your home or workplace.

I suggest considering the following ways to Increase Aquarium pH.

How to increase aquarium pH

Increase Aquarium pH can be done using these methods:

1. Water Changes

The pH of an aquarium can gradually drop as pollutants accumulate. Pollutants are released in a variety of ways, such as by decaying food or fish waste.

Removing these contaminants will aid in restoring the pH to its original state.

Remove 20% of the water in your tank every 2-3 weeks and replace it with tap water (after treating it with dechlorinator).

It’s safer to change modest quantities of water frequently rather than huge volumes less frequently, as this might startle your fish.

Water changes should be performed on a regular basis as part of your aquarium’s overall care and upkeep.

2. Aerating Water To Change pH Levels

Changing how you aerate the water in your aquarium is a common strategy for boosting or reducing water pH.

More carbon dioxide is eliminated when water is aerated, resulting in higher pH values. However, surface motions from cleaning equipment will frequently remove the majority of the extra CO2 from your water, so this isn’t always essential.

3. Boil equipment and jewelry

If you have any driftwood or bogwood in your fish tank, it’s possible that it’s producing tannins and tannic acid, which lowers the pH.

Getting rid of the driftwood is the most straightforward solution. You could boil it if you’re dead keen on keeping it in your setup. Any harmful germs will be killed if this is done on a regular basis.

Other substances, such as peat moss, can also release tannins.

4. Change Your Substrate

A few pH-raising elements are readily available and simple to incorporate into your fish tank. This will have the same effect as adding tannins to reduce the pH.

Crushed coral, limestone, petrified coral, and specific shells are the best options. These are commonly seen in African Cichlid tanks, which have a higher pH than most.

After you add them, check the pH on a frequent basis; it’s easy for the pH to rise over what you want.

You might include these items into your filter if you wish to hide them.

5. Grow Macroalgae

It is, in my opinion, one of the cheapest and most effective techniques for novices to maintain the ideal fish tank water pH level.

One of the benefits of having macro algae in your fish tank is that it helps to maintain a constant pH level in the water. It not only absorbs the dangerous carbon dioxide in your tank, but it also helps to reduce the toxic algae in your tank.

Furthermore, the algae produce dissolved oxygen, which flows throughout the tank’s water, enhancing aeration and, as a result, the pH level.

6. Use Dolomite Shavings or Chippings

Dolomite shavings or chippings will look great in your fish tank. This gravel will provide extra aesthetic appeal to your aquarium design because it is multi-colored.

More significantly, it aids in the raising of the pH level in your aquarium’s water.

Because dolomite contains significant levels of magnesium and calcium, it is excellent at raising the pH of water. It works a little faster than crushed corals, to be honest.

You may use dolomite chipping in your tank’s filter in addition to utilizing it as a substrate.

7. Spice Up Your Fish Tank With Limestones

Limestone, like broken corals, has a high calcium carbonate content, making it a great and safe natural way to raise pH in aquariums.

It doesn’t matter if you have a freshwater or saltwater tank; this natural alternative will suffice.

Limestone is a common landscaping material, so you can obtain it readily and conveniently at building supply stores.

It’s not only cheap, but it’s also one of the most efficient ways to keep aquarium water’s pH stable and high.

8. Add Bicarbonates

  • When bicarbonates are added to the fish tank, the pH level rises significantly. To boost the pH level in your aquarium, use the following ingredients:
  • Aquarium buffers are available at aquarium supply stores and pet stores. They’re high in sodium carbonate and bicarbonates. Aquarium buffers are even more effective than baking soda at raising pH levels.
  • Baking soda: Baking soda is a bicarbonate-containing substance that you may already have on hand. Typically, 1 teaspoon of baking soda per 5 gallons is advised. Instead of just adding the soda to the tank water, dissolve it in some water to maintain a consistent pH level. Baking soda isn’t a one-time fix; you’ll need to monitor the pH level in the fish tank on a regular basis.

Keep in mind how you add bicarbonates.

Using too much soda or buffers can result in a pH spike, which can kill your fish.

It’s advisable to go slowly to avoid stunning or scaring your fish by making a drastic change in the habitat.

What pH should be in your aquarium?

Depending on the sort of fish you have in your fish tank, the pH should be adjusted.

The optimum pH level for each type of fish tank is listed below:

  • Fresh water tanks – pH level of between 5.5 and 7.5 depending on which fish you have
  • Tropical water tanks – pH level 6.0 to 7.0
  • Marine water tanks – pH level 7.6 to 8.4
  • Reef tanks – pH level 8.0 to 8.4

You will need to do frequent pH testing to determine the state of your water. You may next take steps to tailor your fish tank to the demands of your fish or plants based on the findings.

What Happens if the pH Level is too Low?

A low pH level in a fish pond or tank might burn the skin of your fish since it is acidic. Water in a pond or aquarium with a high pH is alkaline or very basic, and it can chemically burn or chap your fish.

How to Test Your Aquarium’s pH

You’ll need a trustworthy pH measurement kit to check the pH level in your fish tank. A pH indicator solution and a chart are included in each test kit so you can see what your aquarium’s pH level is. In order to use this test kit, you’ll also need a tiny sample of aquarium water.

Digital pH meters are the most costly, but they are also the most practical. The pH value will appear on the digital display after just dipping the end into water.

Manual testing kits are more commonly used and much cheaper.

Colored litmus paper test strips are available for purchase. They will change color if you submerge them in water. To calculate the pH, compare this color to the color-coded chart supplied.

Most test strips look for nitrites, nitrates, carbonates, and hardness all at the same time.

Some manual testing kits need you to combine a water sample with a color-changing chemical solution, which is inconvenient.


When it comes to caring for fish, everyone has a few setbacks. Some folks have to cope with sickness, while others have to keep aggressive tank mates apart.

If you’re having difficulties with pH, you should now be considerably more confident in your ability to handle it. There’s no need to be concerned; there are several solutions accessible.

It’s critical that the pH fits your fish’s preferences, but it’s also critical that the pH remains steady.

Your pH should be back to normal in no time if you attempt one or more of the ideas above.

Read also:

9 freshwater eel aquarium for home. Selection and care guide

Want to remove aquarium snails permanently? 7 easy methods

9 best aquarium filter. Selection and installation rules

1 thought on “8 Effective Ways to Increase Aquarium pH”

Leave a Comment

An aquarium is a piece of the underwater world in your home, it will add zest and bring comfort to your life.