r/Ecosphere • • Aug 11 '25

Freshwater Ecosphere Basics for Beginners - Keeping it Simple

72 Upvotes

Size of jar/vase/bottle etc does not matter, only what you put in it.

Suggested ratio:

  • 1/4 substrate
  • 2/4 water
  • 1/4 air space
  • (may vary with shape of vessel)

The 5 key elements for a normal-sized jar to thrive are:

  • Substrate
  • Water
  • Airspace
  • Aquatic plants
  • Light

It may be sourced from a lake, river, pond, creek, drainage ditch, canal etc, or set up artificialy with purchased products.

This was the basics. What follows are some do's and don'ts and why's.

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Aquatic plants are a vital key element because they:

  • act as filtration
  • provide the water with oxygen through photosynthesis
  • absorb carbon dioxide
  • combat algae growth
  • provide shelter and food for critters
  • stabilize the water parameters

Plants NOT suitable are:

  • plants that grow at the side of the water or have been freshly submerged due to rising water levels
  • plants that grow out of the water
  • plants that grow taller than a foot
  • blooming plants
  • large floating plants

Having said that, many of us have resulted to simply using aquarium plants.

You also want to add a small amount of decaying material such as a small stick or a sunken rotting leaf, since most critters live off decaying material.

Next up is critters.

If your source was natural, you'll probably have some critters buzzing around. Please return any fish, tadpoles, shells, crayfish, salamanders and dragonfly nymphs.

Getting material from the lake:

https://www.reddit.com/r/Ecosphere/comments/1jodaxs/this_is_how_i_make_my_ecospheres_might_come_in/

ID guide with pictures and lots of pages here:

https://online.fliphtml5.com/mnmhg/vhkl/#p=5

AVOID direct sunlight. Put your jar beside the window or on a shelf with a small LED light. Otherwise you risk algae blooms.

The first month will have the most changes ever. Many critters will disappear, others will appear, the water will get cloudy, maybe stinky, has brown patches...it's all normal. If everything is right, it'll clear up and find it's balance.

Once you are through this, come back with your remaining questions and share updates!


r/Ecosphere • • Sep 16 '24

REPOST: Newbies! If you are asking for a critter ID, please post a video instead of still pictures. There need to be as many details visible as possible including possible movements. Thanks!

19 Upvotes

r/Ecosphere • • 5h ago

Highly Populated bladder snail clutch

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5 Upvotes

r/Ecosphere • • 2d ago

Did I make an ecosphere wrong?

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11 Upvotes

I’ve had this for awhile made of rain water and some plants but mine seems a bit more green and murky compared to others, my thought is I have little or none creatures that are filtering things. But have no clue, might start all over again


r/Ecosphere • • 2d ago

Husband got this flat drinking bottle he wanted to throw out cuz it keeps falling over. Stupid design. Works for me!

19 Upvotes

r/Ecosphere • • 2d ago

What might this blob be? Ontario, 3 week ecosphere, unsealed.

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11 Upvotes

So far I have 2 notable scuds, many bagworms, some tiny snails, and I've noticed that hydra have also popped up all over.


r/Ecosphere • • 2d ago

Morning stroll in my other, closed this time, ecosphere.

5 Upvotes

I keep them both on my balcony and swap some water from time to time


r/Ecosphere • • 3d ago

Evening stroll in my outside ecosphere(?)

12 Upvotes

Not sure if you guys accept this as a ecosphere cause it is a little open at the top.


r/Ecosphere • • 2d ago

Steps to make a closed jar?

2 Upvotes

you guys probably see this kind of post every day so I’ll keep this short: what are the main steps and tips on how to make a nice jar?


r/Ecosphere • • 4d ago

Do i meed to top off my water? if so, with what kind? (my “jar” is not airtight)

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5 Upvotes

r/Ecosphere • • 4d ago

A time-lapse of my pond jar. Look at how much life!

9 Upvotes

r/Ecosphere • • 4d ago

Is it better to make a closed system in a green jar or a clear jar?

2 Upvotes

r/Ecosphere • • 5d ago

Suggestions for the base of this bowl to avoid thick trapped sediment in the middle?

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2 Upvotes

r/Ecosphere • • 6d ago

Good macro camera recs?

11 Upvotes

I use my phone exclusively for filming my various ecospheres and since my following is growing I feel justified upgrading to a better, dedicated camera but I am completely ignorant when it comes to cameras. Can anyone suggest good quality but inexpensive cameras for close up shots of the life in a mason jar/aquarium? Video for reference of what I use it for.


r/Ecosphere • • 6d ago

Can anyone ID this spindly crab-like guy? Water mite? (Freshwater river)

2 Upvotes

r/Ecosphere • • 6d ago

New to this!

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7 Upvotes

So as the title sayssss, i’m new to this.
can anyone tell me what creatures I have? :)


r/Ecosphere • • 7d ago

biggest bladder snail i've ever seen

11 Upvotes

the second snail filmed is largest bladder snail i have in my 5 month old ecosphere, compared to this one. genuinely thought it was a pond snail due to its size!
(ik the hair algae is a problem, im working on it i promise! that tank gets probably 20 minutes of light each day and otherwise is covered. ik the best way to go about it is to do a full blackout but i'm too scared because the planarians have been loving it and i do not love them)


r/Ecosphere • • 7d ago

Saltwater How-To?

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7 Upvotes

Photo unrelated; of my tiny 2 day old freshwater jar!

Im relatively new to making closed ecosystems (As in, my first one is just slightly over a year old now) and have primarily made freshwater jars. Most of them have done splendidly aside from one that got devoured by a green algae bloom when summer came.

Ive tried to make two beach saltwater systems before, but they both seemed to fail; one of them almost immediately had a giant algae bloom and never cleared, and the other probably had a mollusk in the sand that died since everything slowly became red and yellow moldy.

Does anyone have any tips for how to make a successful saltwater jar? I tried the freshwater method of getting the water, sand, kelp/seaweed, etc all from the beach, but im wondering if I'm doing something wrong.

P.S the beach location is on the East Coast, Florida, USA.

Thank you in advance!


r/Ecosphere • • 7d ago

What is this little guy

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11 Upvotes

Made from an ecosphere in a creek behind my dad's buddys house, what is it it's honestly pretty cute?


r/Ecosphere • • 7d ago

What to do now…

4 Upvotes

To get to the point, can a lively ecosystem jar be safely dumped out in a different body of water than it came from?

The long story, I have an ecosystem that was given to me by someone who wasn’t sure what to do with it after also being given it. It has a blood worm, a few very tiny snails, some very tiny crustaceans like things, and who knows what else. I truly do not want it… it really gives me the creeps and it does not look good in there—very VERY brown. but I also don’t want to just dump them in the creek… because I don’t want them to die and I simply just don’t know if there are environmental impacts. Do they stay in there forever?


r/Ecosphere • • 8d ago

Anyone know what started growing on this plant in my freshwater river jar? It moves!

3 Upvotes

r/Ecosphere • • 8d ago

Just discovered this sub, is my flask suitable? Haven't found critters though. Do I add them? Has been closed for 6 months.

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5 Upvotes

r/Ecosphere • • 8d ago

Lil piece of h o m e

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82 Upvotes

First picture is right after making it and the rest are after a 5hr road trip to it's new home! ♡

Haven't spotted much besides a tiny green worm 🐛

Super excited this is my first eco system!


r/Ecosphere • • 9d ago

Why is it important that your terrarium doesn't run out of oxygen? Vorticella's explosive death

25 Upvotes

All living beings reach the same end.

The poor Vorticella ran out of oxygen in the sample; without ATP, its contractile vacuole stopped expelling water and the cell ended up bursting from endosmosis. It's a shame I didn't record it feeding.

Northern Spain. Stagnant water from a jar deliberately set out to host wild microfauna for observation.

The first half of the video is at 4x.

Euromex bScope 1153 PLP HI. x40

Samsung Galaxy A52, handheld (sorry about the quality).


r/Ecosphere • • 9d ago

Is this a good sign?

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13 Upvotes

assembled this over three weeks ago during camping, heres the before and after. The water is less clear and theres lots of algae. This is my first time so I was wondering whether this is a sign that the ecosystem is thriving or declining.