How to maintain Ph and Gh of the aquarium water?

The PH and GH of the aquarium water are two values ​​​​that you must know so that your fish can live well.

The PH indicates if the water is alkaline, neutral or acidic. It is governed by a scale from 1 to 14, with 1 being the most acid value and 14 the most alkaline. The recommended PH in any aquarium usually ranges between 6.6 and 7.6. Therefore, if the values ​​​​are higher, you have to ask yourself how to lower the PH of the aquarium.

What the GH indicates is the general hardness of the water, and it is based on the dissolved salts that are in the liquid. The GH will allow you to measure the water in degrees of hardness, equaling one drop to one degree. It is a value that can alter the PH of the aquarium and that you must also control for the best maintenance of it.

So, after read this article you are easily maintain ph and gh of the aquarium and you keep your aquarium fish are more healthy and happy.


  • How to lower the PH of the aquarium?
  • How to lower the GH of the aquarium?
  • Can these values ​​​​affect the health of my fish?

1. How to lower the PH of the aquarium?

How to maintain Ph and Gh of the aquarium water?

If you are wondering how to reduce the PH of your aquarium water, here is the solution.

It is very important that you always keep it within adequate levels, depending on the species of fish you have. Not in vain, the sudden variations of the PH will affect them notably; hence you should check this value every week.

If you want to lower the PH of the aquarium you can put these measures into practice:

Install a reverse osmosis unit on the tap, so that the water does not have such a high PH.

Remove part of the aquarium water, adding a little distilled water to balance the PH level.

Infuse CO2 into the aquarium (carbonic acid lowers the PH of the water).

Use silica sand so that the PH does not increase.

Avoid limestone rocks, as they increase the PH (the most recommended are specific aquarium stones).

Place mopani wood logs in the aquarium, which help lower the PH of the aquarium.

Always use peat as soil.

2. How to lower the GH of the aquarium?

Being two related values, it is probable that when the PH increases, the GH also increases. That is why you have to consider how to lower the hardness of the aquarium water.

A first option is to use water softeners , a specific commercial product that you can buy on the web. However, special attention must be paid so that these softeners do not exchange calcium and magnesium for sodium. Especially if you have tropical fish in the aquarium.

More effective is the use of peat, a type of soil that is also used to lower the PH of the water and you can include it in the filter, without clogging it, or periodically in the water.

Another possibility to lower the GH of the aquarium is to use distilled water . This water is free of impurities and salts, such as calcium and magnesium. You can add it manually or through reverse osmosis devices to have greater control.

3. Can these values ​​​​affect the health of my fish?


The quality of the aquarium water is essential for the care of the fish. Not only will it have to be kept clean, but fundamental values ​​​​such as PH and GH of the aquarium water will also have to be taken care of. Two values ​​​​that, if they are not within the appropriate parameters, can affect the health of the living beings in the aquarium.

If the PH remains stable, the water will not undergo rapid changes that affect the stress of the fish. The same happens with GH, which must be maintained at adequate levels. What is intended with this is to ensure that the water is as similar as possible to that of the natural environment in which the fish live. Otherwise, they will find a habitat in which it is impossible to survive.

However, it can be said that there is no ideal PH level for all fish. So this value should be placed in a range between 6.6 and 7.6. Regarding GH, fish prefer soft to medium hard water, so the range should be between 0 and 8 (0 to 4 indicates soft water, 4 to 8 medium hard water).

In short, it is very important to consider how to lower the PH and GH of the aquarium water fish. So that the living beings that live in it can be in the best conditions. Both levels must be checked at least once a week so that the maintenance of the water is the most appropriate. Two levels that, if uncontrolled, will affect the health of the fish to the point of causing disorders in the water that prevent them from living normally.


So, my friends may i fully try to give you solutions you through this article how can you maintain your aquarium water ph and gh level . So, if you think this article it’s a really useful for a aquarium hobbyist please share your friends and family.


Have a nice day!!


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