Choosing the Best Water for Healthy Marimo Moss Balls

Choosing the Best Water for Healthy Marimo Moss Balls

A splash of the right water can transform your Moss Amigos moss balls from surviving to thriving. 

It turns out that the secret to vibrant, lush moss balls in water isn't just love and light — it's also about making the perfect water choice. 

Let's get into the basics of Marimo care, showing you how picking the right water helps your moss balls get by and thrive. Let's learn more!

Key Water Quality Parameters

Let's talk about the water stuff that really matters for your Marimo's health. Three big things to watch are pH level, how hard the water is, and if there are any yucky bits in it. 

For the pH, Marimo is happiest when the water's pH is between 6.5 and 7.5, nicely balanced, not too acidic like vinegar, nor too basic like baking soda. 

When discussing water hardness, Marimo tends to thrive in water that has a moderate level of general hardness; this means the water has just the right amount of minerals and is not too overloaded.

Water Hardness Scale from soft (0 to 17 ppm) to very hard (more than 180 ppm).

And contaminants? Those are the no-go's, including high chlorine levels or heavy metals that shouldn't be there because they can make Marimo sick. 

Take Note: Keeping an eye on these parameters, ensuring your pH is balanced, the hardness is just right, and the water is clean of contaminants, will help your moss ball in water stay healthy, vibrant, and green.

Now that we understand the key water parameters for Marimo health, it's time to get into the various water options and their effects.

Types of Water and Their Impact on Moss Amigos Moss Balls

Here's a look at different water types to consider:

Tap Water

Peeking into tap water, we see it's an easy grab but comes with a mixed bag of goodies and baddies. The good? It's right there in your home, ready to go. The not-so-good? It might have stuff like chlorine or metals that don't sit well with Marimo. Plus, the pH and hardness can be all over the place. 

So, if you go this route, letting the water sit out to let some of the chlorine evaporate or using a water conditioner might do the trick. Remember to consider the marimo moss ball water temperature; they thrive in cooler temperatures, so tap water should be cool.

Distilled Water

Then there's distilled water, like giving Marimo a clean slate. It's super pure, no minerals, no contaminants, just H2O. Sounds perfect. Well, almost. 

Marimo likes some minerals, so if you're going the distilled route, think about adding mineral back into the mix to keep them happy.


How about catching some rain? Rainwater is like nature's brew, usually soft and gentle, which Marimo loves. But it's a wild card. Depending on where you live, it might pick up pollutants from the air on its way down. If you're in a clean, green area, rainwater could be a jackpot. In the city? Maybe give it a second thought.

Bottled Spring Water

Lastly, there's bottled spring water, which feels a bit fancy. It's consistent and comes with a natural mix of minerals, making it a solid choice for moss care. Just like picking a favorite snack, though, check the labels. You want to ensure the mineral content is manageable, just right in the Goldilocks zone for your mossy friend.

Forget the guesswork and uncertainties of tap, distilled, rain, or bottled spring water. Our Starter Kit is the ultimate solution, providing water that is perfectly balanced for your Marimo. With our starter kit, you get 100% safe water, ensuring your Marimo's health and growth without the hassle. Choose simplicity and certainty with MossAmigos, where we've tailored our product to guarantee the best care for your Marimo.


In sum, the key to Moss Amigos moss ball vitality lies in your chosen water. While exploring options like a tap, distilled, rain, or bottled spring water, remember the importance of making an informed decision for your Marimo's environment. 

Our Starter Kit presents a straightforward, optimal solution, eliminating guesswork and ensuring your Marimo thrives. 

Trust in the right tools and knowledge, and steer your Marimo towards a vibrant, healthy life with Moss Amigos.


Saalidong, B. M., Aram, S. A., Otu, S., & Lartey, P. O. (2022b). Examining the dynamics of the relationship between water pH and other water quality parameters in ground and surface water systems. PLOS ONE, 17(1), e0262117.

Unique marimo threatened by rising lake temperatures. (2023, October 23). ScienceDaily.

Anabtawi, F., Mahmoud, N., Al‐Khatib, I. A., & Hung, Y. (2022). Heavy metals in harvested rainwater used for domestic purposes in rural areas: Yatta area, Palestine as a case study. International Journal of Environmental Research and Public Health, 19(5), 2683.

Back to blog