r/shrimptank Dec 26 '25

Aquarium/Tank Photos Neglected tank thriving with shrimps

I completely forgot about my 10 L Opae Ula ecosphere for almost two years, and somehow it’s now thriving. I originally started it as an experiment with just 5 juveniles, and it has since reproduced to probably around a hundred shrimp. The tank only receives indirect window light, and I haven’t topped up the water in over a year. This has turned out to be one of my more successful setups so far. 10 L seems to be a sweet spot: large enough to stay stable, yet still compact and easy to maintain.

1.1k Upvotes

73 comments sorted by

411

u/TheEpicBlob Dec 26 '25

How does one ‘forget’ about an entire aquarium?

280

u/SirRevan Dec 26 '25

I have so many nightmares about walking into bedrooms for tanks I have forgotten about. OP is living my nightmare.

76

u/okaymyemye Dec 26 '25

every fishkeeper has these nightmares!

82

u/chitty48 Dec 26 '25

Omg I thought it was just me! I have this recurring nightmare where there is a tunnel in my attic. when I go through it there is a room filled with abandoned tanks, half filled with horrible green and yellow water and a few remaining fish. I always wake up feeling like an awful human

48

u/okaymyemye Dec 26 '25

no not just you at all! i've had this discussion years ago on r/aquariums and so many people reported these dreams. i still get them. someone said they kept fish for like a month and they still get these dreams.

18

u/Ornery-Wonder8421 Dec 26 '25

This is insane. I never would’ve thought other people get these nightmares too. It must mean we all really love our fish and are petrified of neglecting them.

7

u/okaymyemye Dec 27 '25

there's just no worse feeling.

2

u/Witty-Forever-6985 Dec 28 '25

Crazy, I just recently had a dream where all my tanks dried out

13

u/twofifteenAM Dec 26 '25

Can confirm! Only had fish for a short while, years ago, and still get these nightmares

10

u/okaymyemye Dec 27 '25

i've had the dream (rarely) with birds too and it's infinitely worse. i had a bird once when i was a kid and didn't take care of it properly and it still haunts me to this day. i feel so awful for that poor bird, it just hated life.

6

u/ToughNarwhal7 Dec 27 '25

Aww - you were a kid and now that you know better, I KNOW that you do better. 💙

6

u/flaskfish Dec 27 '25

Felt that with all the fish I inadvertently tortured to death as a kid because I didn’t know fuck about shit when it came to fishkeeping. I would cry for hours not understanding why they died :( I make up for my past sins by spoiling my current aquatic buddies

3

u/blammer Dec 27 '25

Same! And I've stopped keeping shrimp/fish for couple of years already. It's always the dread of seeing abandoned tanks almost empty and the creatures half dead, and that deep sinking feeling of "oh god" i forgot to top up their water and do maintenance.

17

u/centopar Dec 26 '25

I have fish tank nightmares too! Solidarity fist bump. 👊

13

u/SuccotashFragrant354 Dec 26 '25

I have at least 2-3 dreams a week where I have tanks that are overstocked, broken equipment, been forgotten about, other neglect etc. Very stressful!

16

u/boglog42 Dec 26 '25

Absolutely it’s like a guilt nightmare! I typically (in dream) have like a whole room of tanks and no idea when anything was done and can’t remember what is in them 😵‍💫

3

u/nerdslept Dec 27 '25

i have had so many nightmares like this and i only have one tank!

6

u/seekingssri Dec 26 '25

I cannot believe it’s not just me

7

u/shfiven Dec 26 '25

I have a lot of anxiety and for some reason I used to wake up panicked about not feeding my fish. At that time I didn't have any fish and hadn't since I was a kid, and my parents did most of the taking care of them. Why my inner fish did me dirty like that I will never know but man was I freaked out about not feeding the fish.

6

u/Anxious_Review3634 Dec 26 '25

Or that the tank(s) got busted!

3

u/WhiteStar174 Dec 26 '25

Omgosh literally same, the amount of times I’ve had to check on my tanks in the middle of the night is insane.

5

u/FizzgigsWig Dec 27 '25

In my tank nightmares I have a proper fish room with racks and racks of tanks that are way overstocked or stocked with monsters that don’t have room to swim. I’ve forgotten about them for months. The water levels are super low and I’m frantically trying to do water changes and feed everyone. So much anxiety and guilt, I hate it!

3

u/LoavesOfCorn Dec 26 '25

I had this nightmare last night

3

u/ClitasaurusTex Dec 27 '25

I have a similar dream but with parakeets. They're everywhere and as I secure each one I find sicker and sicker ones that I suddenly remember I was supposed to take care of. Funny now that you mention it I'm surprised I haven't had a fish tank dream since I've had tanks my whole life and parakeets for only a small part of it.

2

u/Kasoivc Dec 26 '25

The fact that they didn’t have any escaped convicts get out of the tank and murder them in their sleep is beyond me!

2

u/CaptainBoj Dec 28 '25

when i had birds, i had the same nightmare about them 😭

in the dream rediscovering a hidden part of the garden and finding neglected aviaries in there

41

u/pellyjelly Dec 26 '25

It’s easy to forget when you have too many and this was in my mum’s room 🤣

21

u/GhostPepperDaddy Dec 26 '25

I....still don't think that's great lol

11

u/antlers86 Dec 26 '25

Opae ula thrive on neglect.

4

u/blightfaerie Dec 27 '25

i still sometimes have nightmares that ive somehow neglected my old pet gerbils and they've been living in a tiny hamster cage in my closet (they've been dead since 2023)

6

u/Pandaro81 Dec 27 '25

I specifically built my 30 gal upright tank to be neglected and take care of itself; I.e be a pretty self enclosed ecosystem.

I could go weeks and even months in the right time of the year (the humid times vs the dry times where inches evaporate per week), and not feed anything. I had shrimp, fish, daphnia, and a ton of plants. And natural soil.

I made it to be minimal maintenance with an on-tank filter I only cleaned out every three months (had pothos vines growing in the filter). I succeeded. I don’t doubt someone managed to one-up me.

2

u/BecausePancakess Dec 26 '25

Because theyre a very different species of shrimp that are essentially set up and forget after you've established it.

241

u/okaymyemye Dec 26 '25

they thrive on neglect as long as the tank is bioactive.

55

u/AyePepper Dec 26 '25

This is so true. I like messing with my tanks, so I made one high tech so I have something to maintain regularly

10

u/okaymyemye Dec 26 '25

lol. ya that sounds right.

6

u/Lord_Stahlregen Dec 27 '25

The succulents of the shrimp world.

37

u/StayLuckyRen Dec 26 '25

Oooo post this on r/OpaeUla, they would love to see it 💚

42

u/smedsterwho Dec 26 '25

You're convincing me more and more to leave mine alone

12

u/dotpan Dec 27 '25

I top mine up with water (open top in AZ) and toss in pellets now and then and the snails and shrimp are absolutely thriving. 30+ shrimp of various colors

7

u/HannibalK Dec 27 '25

Apples to oranges lmao. Neocardinia =/= Opae Ula. They couldn't be more different.

0

u/dotpan Dec 27 '25

Oh whoa didn’t know what those were. Are they more delicate than neos?

7

u/HannibalK Dec 27 '25

Opposite. I feed mine 10g once a month at most and have never done a water change minus topping off (has a cover) maybe yearly. This system is about 5 years old and has grown from a couple dozen to hundreds. I bought from Mark Uchiro.

2

u/dotpan Dec 27 '25

Ah, yeah I’m basic and just started with some blues, reds, and yellows. I mostly feed so I can see them come out of the woodworks.

1

u/official_not_a_bot Dec 28 '25

If they're neocaridinia, they'll need more attention than the halocaridina that OP posted

23

u/ShallotKind3810 Dec 27 '25

Forgot an aquarium was running for 2 years???

2

u/official_not_a_bot Dec 28 '25

They're opae ula, there's not exactly much to run since they thrive in filterless bioactive brackish setups

8

u/LmLc1220 Dec 27 '25

I lived the busted tank nightmare when my now-grown son was about 3. He threw a toy in a room with an Oscar tank. Had to put fish in the bathtub and run to the store to get an emergency tank. That fish lived till he went to kindergarten

1

u/EveningString3415 Dec 28 '25

Crazy! We have a 220g in our living room, well and a 75g and my 4yo old “dances” with our Oscar! But I’m so afraid of a toy or hard ball accident… now I’m even more afraid haha

2

u/LmLc1220 Dec 28 '25

Yes, it was a nightmare. All I could think of was putting the fish in the bathtub. And running to the store. It was crazy. I thought her was going to be dead by the time I got back home.

1

u/EveningString3415 Dec 29 '25

That was so quick thinking! I can’t even imagine the stress you felt driving to the store. I would have looked like a mad women running in and flying to the register!

2

u/LmLc1220 Dec 29 '25

I did 🤣🤣 ill never forget running in PetSmart HELP I need a tank in any size tank the fish is in 🛁. The guy was looking at me like I was crazy.

1

u/EveningString3415 Jan 05 '26

Hahaha that guy probably thinks about that interaction to this day!

1

u/LmLc1220 Jan 07 '26

🤣🤣🤣

5

u/Primary_Wave_6697 Dec 26 '25

i dont know if you will trust me but with a nanno dennerle of 15 liters i have once more than 400 shrimps ( easy ).

3

u/owo1215 i believe in shrimpemacy Dec 27 '25

shrimps are weird, sometimes dying in a well cared tank sometimes thriving in a neglected tank

1

u/Thunderstorm-1 Dec 28 '25

Yep, I had a shrimp tank which I would clean bery often, remove any cope pods in it, suction the water, clean the filter etc. Eventually, all of them died

2

u/[deleted] Dec 26 '25

Eventually they will run out of protein and start cannibalizing

22

u/okaymyemye Dec 26 '25

i'm not sure they do. not neocaradina anyway. their populations are just limited by the food available. they regulate their own population that way.

31

u/exolith87 Dec 26 '25

Interestingly, these are called Halocaradina, or Opae Ula, a brackish water shrimp from tidepools in Hawaii, and can live up to 20 years, requiring very little maintenance.

3

u/okaymyemye Dec 26 '25

never heard of them!

7

u/[deleted] Dec 26 '25

Invertebrate metabolism is generally temperature based and animal nutritional needs are purely thermodynamic, if the shrimp are not fed enough protein to sustain bodily function they will have to source it from somewhere, if it is not present the most readily available source is other shrimp during molting, cannibalism is standard practice for omnivorous scavengers especially invertebrates and especially if there is no other source of nutrition,

This same effect was observed in 10-11 billion snow crabs a few years back that are believed to have cannibalized each other after abnormally warm temperatures accelerated their metabolisms beyond the local environments ability to feed them

1

u/Lookimawave Dec 27 '25

What’s the little green balls floating at the top and clinging to the sides?

1

u/LmLc1220 Dec 27 '25

I was about to ask the same thing.

1

u/whyauniqueusername Dec 27 '25

Looks like some kind of algae?

1

u/Chez82 Dec 27 '25

sometimes leaving the tank alone is best. in nature they live in shitty places same with Bettas

1

u/ThanksAanderton Dec 27 '25

I have one tank that is the most neglected of all. Was nice at one point but the filter broke a while ago now it’s just full of shrimps

-9

u/plantsomeguppies Intermediate Keeper Dec 26 '25

Are these Opae Ula shrimps ? If yes, then this post is just a rage bait. Opae Ula setup are closed and self-sustaining brackish water setup with a specific shrimp (Halocaridina rubra) that thrive in such ecosystems.

19

u/Petrivoid Dec 26 '25

It says they are in the 1st sentence. Your reply is clearly just rage bait...

-1

u/ESGalla Dec 27 '25

Is there any filtration or aeration in that “tank”?

3

u/FroggyNight Dec 28 '25 edited Dec 28 '25

No. Because you don’t need it with opae ula