3 Pros & 4 Cons Of Spring Water For Fish Tanks

Last Updated on 2023-09-20

If you’re wondering whether spring water is good for your fish tank, then you’ve found the right article. Not only will you learn the pros and cons of using spring water, but you’ll also learn how to prepare it properly, what to look out for, and how it compares to other types of water you can add to your aquarium as well!

So keep reading to find out everything you need to know about spring water in your fish tank!

Can You Use Spring Water In A Fish Tank?

Not only can you use spring water in a fish tank, but it’s also some of the best water you can add to your fish tank! Spring water is naturally full of nutrients and minerals that are not just good for your fish but for the ecosystem of your fish tank as well!

However, the most important thing to remember is that before you use spring water in your tank, you should test it thoroughly first because each source of spring water can differ vastly.

What Are The Benefits Of Using Spring Water?

If you plan on using spring water in your aquarium, there are multiple reasons you should consider doing so! Which include:

The Minerals Stabilize The Tank

One of the main benefits of spring water for your tank is the fact it will help stabilize the pH levels. The minerals you find in spring water, such as magnesium, calcium, and iron are perfect for this.

It May Be Better Than Tap Water

Sometimes, it may be the case that spring water is better for your tank than tap water. If you have tap water that is particularly acidic, alkaline, or too hard, then you may be better off using spring water instead.

Provides Nourishment For Your Fish

Again, because spring water is full of minerals and vitamins, it can provide your fish with a lot of the essential nutrients they need to survive.

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What Are The Downsides Of Spring Water?

While there are a lot of benefits to spring water, there are also some downsides. Before deciding to put spring water in your fish tank, you should consider the following.

The Oxygen Content Might Not Be As High

One problem with spring water is that the oxygen content might not be as high. Because spring water spends most of its time below ground, this can often mean it isn’t as oxygenated as the water above ground.

It Could Be Contaminated

Another problem with spring water is that it could be contaminated with chemicals or pollution depending on the source you’re getting it from.

It May Be Expensive

If you plan on buying bottled spring water for your tank, then it could become expensive, especially if you plan on filling a large tank.

The Water Parameters Might Not Be Right

And lastly, before adding spring water to your tank, you should also make sure that the water parameters are what you need. Oftentimes, the pH of spring water can fluctuate between 6.5-8.5 depending on the source, so checking the pH beforehand is paramount!

How To Prepare Spring Water For Your Tank

If you plan on adding fresh spring water to your tank, then here is what you should do to prepare it.

  1. The first step before anything is to boil the water. Doing this will remove any harmful bacteria that may be floating around in there.
  2. Once you’ve boiled it and let it cool, you should then test the pH. If the pH, ammonia, nitrites, and nitrates. If all the parameters are met, you can then get ready to add it to your tank.
  3. To add it to your tank, make sure that the temperature of the water matches the temperature of your fish tank.
  4. Lastly, I like to add API Stress Coat to the water before adding it to the tank. Not only is it a de-chlorinator, but it also reduces stress in fish and improves their slime coat as well!

Do You Need To Dechlorinate Spring Water?

Whether you need to dechlorinate spring water or not depends entirely on its source. If you know that it’s come straight from the ground, then it won’t contain chlorine; therefore, it won’t need dechlorinating.

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What Other Types Of Water Can You Use?

If you’re not set on using spring water in your tank, then, fortunately, there’s a whole range of different water you can use for your fish as well!

Tap Water

Of course, the go-to choice is tap water. It’s the quickest and most inexpensive choice of all. Just make sure that before you add tap water to your tank that you’re dechlorinating it first.

Filtered Water

If you already have filtered water in your house, then this is going to be a great choice for your fish tank as well! And it’s also going to have the added benefit of not needing to be dechlorinated too!

What Water Is Best Avoided In Fish Tanks?

There is also a lot of water that you’ll definitely want to avoid adding to your tank as well! This includes:

Distilled Water

Distilled water is one type that you’re definitely going to want to avoid. When water is distilled, all of the minerals and nutrients are completely stripped from it. This means that your fish won’t have the essential nutrients they need to survive.

RO Water

You should also carefully consider RO water before you add it to your tank. While it’s not bad for the tank, it will definitely need to be remineralized before being added to the tank.

Rain Water

While you can consider using rain water, it’s important to note once again that generally, the pH and mineral content in rainwater is low as well due to the evaporation process that occurs. 


Here are some frequently asked questions that people often have about adding spring water to their fish tank.

What Is The pH Of Spring Water?

Generally speaking, most tap water will be between a pH of 6.5-8.5.

Is Purified Water Better Than Spring Water For Fish Tanks?

If the purified water you add to your tank is remineralized beforehand, then it’s going to be better. However, if the purified water hasn’t been remineralized, then spring water will be better.

Can Spring Water Kill Fish In Fish Tanks?

If the spring water you add to your fish tank is contaminated, then it could end up killing your fish. Likewise, if the pH or other water parameters are too high, then it could also end up killing your fish.

Spring Vs. Distilled Water For Fish Tanks

You should also always choose spring water over distilled water. Distilled water has had everything removed from it, so over time, your fish will become more and more malnourished.

Is Bottled Spring Water Okay For Fish Tanks?

Bottled spring water is going to be absolutely fine for your fish tank. You just need to make sure you’re checking the pH before adding it to your tank.

Can You Use Poland Spring Water For Your Fish Tank?

Just like any other spring water, Poland spring water should also be fine for your tank. Just check the pH before adding it.

Can You Use Spring Water In Betta Fish Tanks?

Betta fish can live just fine in spring water, along with any other fish. But before adding spring water to your tank, you only need to check the water parameters to make sure it’s safe.

Instead Of Using Chemicals, Should You Buy Spring Water For Your Fish Tank?

This is all down to personal preference. Both are good choices; however, using a water conditioner is going to be a lot cheaper and give you a lot more reliable results time after time. 


As you can see, spring water can be a great choice for your fish tank as long as you’re doing your due diligence before adding it to your tank. And if you’re not sure about spring water, then you should just stick to conditioned tap water.

If you like this article, make sure you check out the rest of the website. Otherwise, have a great day!

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