Best Jars for an Enclosed, Self-sustaining Water Ecosystem / Jarrarium (2024 Update)

I am REALLY passionate about jarrariums and self sustaining water ecosystems, having created over a dozen over the years, and still running multiple at the moment.

Today, we’re going to talk about one really important aspect of creating these amazing ecosystems: choosing the best jars for them.

I say that the most important element when starting a jarrarium, is the jar itself. After trying several types, I realized that some are better than others for this job.

And in today’s article, I will share with you how to choose the best jar for your upcoming jarrarium, plus a list of options that you can order online in order to make it as easy as possible to start your new project.

Please note: We get commissions for purchases made through links in this article, at no extra costs for you.

List of the best jars for jarrariums

If you don’t care about reading all the details that I have to share with you, check out the jars below and just pick the one that seems best for your upcoming project.

(Have in mind that its capacity is probably the most important factor to consider – larger ones give you more options and are generally better, in my opinion)

JarCapacityStore Link
48 oz / 1.4 lCheck price
Wide Mouth
Mason Jar
64 oz / 1.9 lCheck price
Square Jar
with Blue Lid
67.5 oz / 2 lCheck price
Clear Glass
102 oz / 3 lCheck price
4 liter Fido Jar
135 oz / 4 lCheck price
Glass Barrel
2.5 gallon / 9 lCheck price
Glass Jar
2.5 gallon / 9 lCheck price

In-depth look at the best jarrarium jars

Now, let’s check some bigger images of our recommended jars and see what makes them special.


If you’re just starting or if you don’t have a lot of room for your jarrarium, this small jar might be the perfect choice.

It offers a capacity of just 48 oz / 1.4 liters – so you won’t be able to do a lot with it, but it’s better than nothing and even better for starting up.

I actually have a similarly-sized sealed ecosphere with 2 shrimps ready to celebrate its first birthday, so you do have options.

Have in mind that this is a tall jar, not a wide one, so you will have to go with plants that grow high (I personally prefer wider jars, to be honest).

The lid is also bamboo-made (with a silicone ring for perfect sealing), but this also means that adding external lighting from the top – if you need that – will be impossible.

But this is the type of jar that you keep on the windowsill in indirect natural light anyway.

Click here to check the price now

Wide Mouth Mason Jar

Now this is your classic pickle jar and a perfect choice for a water ecosystem. It is large enough to give you some room to play with the design, but not huge to become a problem storage-wise.

You are getting 64 oz / 1.9 liters in terms of capacity, which I consider enough for most jarrariums.

It has a wide mouth (4″), it is clean and simple – which is exactly what you want. The only potential con is the plastic lid which makes lighting from the top a bit more difficult, but not a deal breaker in my books.

Click here to check the price now

Square Jar with Blue Lid

I will start by saying that this is my favorite type of jar when it comes to sealing: I don’t think it can get better than this!

Plus, in this case, the blue top gives it some extra glam and will make everything look better when you fill it up (and especially if you add extra light from the top).

It is still on the smaller size at 67.5 oz / 2 liters – but it still offers a bit of room to play and aquascape a bit, even add a snail or a couple of shrimp.

Click here to check the price now

Clear Glass Jar

3 liter glass jar

We’re now moving to what I consider a decently-sized jar for a self sustaining ecosystem: 102 oz / 3 liters.

A regular jar with no bells and whistles, but with a perfect lid that seals as tight as possible, offering enough room for plants and decorations, as well as some tiny animals (snails and shrimp) if you want to have some inside.

It’s much easier to manage and make a larger jar work, so definitely consider this one or any of the larger ones if you have enough space and are serious about this hobby!

Click here to check the price now

4 liter Fido Jar

4 liter fido jar

Now, I must admit that I am really satisfied with this find: this jar is perfect for a water ecosystem, as it has just the right size and capacity! It’s neither too big, nor too small. It’s perfect for most situations in my opinion.

It makes water changes and maintenance a breeze thanks to its large mouth and at 4 liters (135¼ Ounce) it’s big enough to let your creativity roam free and create something amazing.

I would add one Betta fish here (even though most would say that it’s still not enough water, it’s a lot better than what they get in pet shops where they are kept even in drinking glasses…), or maybe 8-10 micro fish or just shrimp… Your choice though, but this jar is really nice!

Click here to check the price now

Glass Barrel Jar

This is not the easiest jar to look through, but it can definitely hold a lot of life, thanks to its 2.5 gallon / 9 liters capacity.

It is easy to carry around and gives you a lot of room to play, but apart from the fact that the glass and its design will make it a bit difficult to look through, the lid is not my favorite either.

But it is very large and due to its shape, can offer the opportunity for some interesting designs. Plus, it’s large enough to let you store some livestock inside as well!

Click here to check the price now

Montana Glass Jar

Another really large jar of 2.5 gallon / 9 liters, but which is now easier to look through and perfect in my opinion for those who are not afraid of giving it a go with a large jar.

It can definitely accommodate more life than all the others, including animals – from snails to shrimp, and maybe even a couple of tiny fish or a Betta.

In terms of large jars, this is definitely my favorite, with my only complain being the opaque lid which doesn’t make it easy for us to add external lighting.

Click here to check the price now

How to choose the best jar for a water ecosystem / jarrarium

I’ve seen a bunch of self sustaining water ecosystem and jarrariums made in very fancy looking jars.

The problem is that, long term, most of these fancy jars of bowls or bottles don’t work well.

What works best? Simple jars that you can easily see through. It’s an added bonus if you can easily fit your hand through the opening – any maintenance will e A LOT easier this way.

four jarrariums
Some of my jarrariums in pretty basic (yet beautiful imho) jars.

Old cookie jars with nice designs, whiskey bottles or any sort of jar that doesn’t have a very clear glass to see through will be poor choices, in reality as you won’t really see much of what is inside.

If you want to do maintenance, you’ll have a tough time doing so. If you’re doing no maintenance, the algae growth and the darker colors will make it impossible to see inside.

Also, the smaller the container is, the more difficult it will be for you to accommodate plants and potential life like invertebrates or snails.

Plants will grow quickly, filling your special container fast and will be unpleasant to the eye.

Then they will die and rot and make the entire thing horrible and potentially destroy your jar and everything in it.

Finally, make sure that the mouth of the jar is wide enough to allow you to put your hand through it with ease.

If you are planning to do any sort of maintenance on your jar, it’s going to be very difficult otherwise!

This is why I always recommend getting a pretty basic jar: easy to maintain, easy to see through, easy to seal or unseal if you need to do it. Make sure it’s large, transparent and you will love it – what is inside matters the most!

Think long term here and remember that any bells and whistles will most likely turn ugly in a few to several months (and give you headaches in the long run, potentially making your entire ecosphere unusable).

Best size for your next water ecosystem

Tiny jarrarium
My tiny java moss jar running since 2016!

The best part about creating jarrariums – be them self sustaining or not, sealed or unsealed – is that you can choose any size – from the smallest available to humongous jars – depending on what you want to achieve.

I have had great success with tiny self-sustaining containers (maybe 5 ml of water or less) and a tiny bit of algae or moss ball. But generally, the larger the container, the more you can achieve.

Livestock in jarrariums – yes or no?

If you want your container to have some sort of variety of plants and maybe animal life like shrimps or snails, you will need a minimum of 2 liters (68oz).

Based on my own experience, anything between 2 – 5 liters (68 – 169 oz) gives you a lot of room to play in terms of decorations, adding plants and shrimp or snails.

Have in mind that snails – even though they look good early on, will multiply like crazy. So choose some that won’t reproduce as easily, like the Zebra Nerite or one large Mystery Snail (although it might require additional feeding).

IF you want to add fish to your jarrarium or water ecosphere (whatever you want to call it), you will generally need a larger jar – 5 to 10 liter or larger is recommended (1.3 to 2.6 gallons) but even so, you won’t be able to add a ton of fish.

For such a size, consider adding one single Betta or a few mini fish like the Rasbora Maculata or Microrasbora Kobutai.

These tiny fish can live well in a jar, but many people would still consider the container too small for them.

Even more, you can’t think of having a self-sustaining jar in this case, as you will need to constantly feed your fish and change water regularly, as you would do with an aquarium.

But I do have a livestock jarrarium and, once I managed to fully establish it, I am only only doing one partial water change every 1-2 months. So definitely not a lot of maintenance.

You can read my entire article dedicated to adding livestock to jarrariums here.

Self sustaining jarrarium or not?

My shrimp jarrarium
There’s a lot of life in my shrimp / snail jarrarium

I love the idea of creating self sustaining ecoshperes and jars, but the truth is that anything with life in it will require some sort of maintenance in most cases.

If you want to build a self sustaining jar, start with plants only. You will have a lot of success by adding any type of plant that doesn’t require CO2 or special conditions.

Plants like any type of Anubias, Vallisnerias, Egeria (beware its rapid growth!) or Java Moss will do really well in any sort of jars. There are other plants that can thrive in a self-sustaining jar, but these are tested by myself and never fail.

You can check out my list of recommended plants for jarrariums if you need some inspiration.

Of course, you need to make sure that you choose the right substrate for your jarrarium to encourage plant growth, but with plants the golden rule of thumb is that it’s easier than it is when adding livestock.

Adding living beings to your aquarium makes the self-sustaining part a bit more complicated.

The easiest livestock to add are shrimp (hardy ones like the Red Cherry Shrimps) or Snails – anything else and it’s virtually impossible to have a self sustaining jar

Out of the two, Snails are actually considered poop factories. Combine that with the fact that most snails multiply like crazy, and you’ll get very dirty water really soon.

This is why I believe that the only real route for having a self sustaining ecosystem with livestock is by adding a few shrimp only.


I have managed to achieve that with one of my jars (which is going almost 12 months strong with no casualties and two happy shrimp inhabitants)… but anything else would be difficult to say the least.

However, if you don’t mind doing regular water changes (from once a week to once a month) and also feed your animals living in the jar, you have a lot more options.

IMPORTANT: If you decide to add animals to your aquarium, make sure that you have a proper water temperature at all times!

So in the end, it’s a matter of preferences and how involved you want to be with the maintenance of your jar. But I would recommend beginners to start with a plants-only jar, and upgrade later on after a few to several months if they feel the need to do so.

Judging on the fact that I now have 8 water ecoshperes (with 1 more planned), you will probably not stop at 1 jar only. Either way, future articles will detail more in-depth the creation process of both self-sustaining and maintenance-requiring jarrariums.

Wrapping up

You probably have now all the details that you need for building your own jarrarium, as well as great jars to start with.

If you have additional comments or questions, don’t hesitate to share them with me by commenting below!

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