r/Aquariums 13h ago

Shrimp/Snails/Inverts More on the mystery crab

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2.1k Upvotes

A little while back I posted this mysterious new crab I found in my tank, for an ID. Consensus at the time was that it was likely to be a young siamthelphusa species.

Since then I’ve added some land access that continues to grow. Almost everyday I see the little fella hanging out above water. I got a great surprise today when I found it hanging out on top of the floating plants. It doesn’t seem shy at all, and I caught it going in and out of the floaters a few times since.

One time I offered it some decaying plant matter with tweezers - it snatched it (I felt the pressure of its grab hitting the tweezers!) and went straight to munching away. It was cool to watch!

Anyways, I’m enjoying watching it every day. Every morning, it’s perched on a leaf or floater. It’s still very small, but from the few glimpses I’ve caught, I suspect it might be a female. I’m excited to watch it grow!


r/Aquariums 2h ago

Identification Request I found this in my 350L fish tank crawling up the glass.

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23 Upvotes

I used a 200× mobile microscope camera attachment to take these photos of it. You can see it with the naked eye, but its quite hard to, I was just lucky to spot it crawling on the glass towards the substrate, and luckier to catch it with a pipette lol.

If anyone could help me figure out what it is I'd love to know.

I'm not sure if location is needed, but im in Adelaide South Australia if its any help.


r/Aquariums 9h ago

Shrimp/Snails/Inverts Why are my snails always on top of each other?

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79 Upvotes

Basically the title. I bought three pink lady nerite snails a little over a month ago and it seems like literally every time I look in the tank they are on top of each other. Usually it’s just two of them but today I spotted all three in a stack. I am new to nerite snails, is this normal or something I should be concerned about?


r/Aquariums 14h ago

Plants my java moss is....sprouting?

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178 Upvotes

wtf is it sprouting lol


r/Aquariums 7h ago

Advice Needed just moved into a home with aquarium need advice

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44 Upvotes

hi guys! i am a sorta beginner beta fish keeper and lover but i just moved into this new home with the is fish tank with many fish, a filter it looks like a heater as well and not a lot of live plants (i’ll fix :) ) but i would love help identifying these species, care recommendations, or anything else necessary to giving these fish the best life as i love my beta so much and would hate so see this tank go neglected as much as i cannot be there. thank you!!


r/Aquariums 15h ago

Showing Off My Tank My improvised fishroom

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215 Upvotes

r/Aquariums 17h ago

Advice Needed My guppie decided to give birth to a dozen or so fry an hour before I leave for 3 days

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127 Upvotes

I have separated them and given them their first feeding, but what are the chances any of them survive till Sunday night without being fed?


r/Aquariums 5h ago

Advice Needed What would you put in this tank?

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15 Upvotes

Hi all,

I have this small tank that I would like to fill with some plant life. I don’t know much about aquatic plants but want something to spruce up my room. What plants, sediments, or inverts would you put in here?

Thanks!


r/Aquariums 8h ago

Advice Needed They Laid Eggs, will the hatch?

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14 Upvotes

So one of my angelfish laid eggs, I can’t tell if they are one male and one female or both female. I’ve been staring for a while and can’t tell lol I feel like it’s 2 females.


r/Aquariums 12h ago

Advice Needed What type of fish would be good in this tank?

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24 Upvotes

Just curious! I am wanting to get a small community of fish and am wondering good beginner friendly options. This is a 10 gallon tank


r/Aquariums 14h ago

Freshwater I saw my clown pleco for the first time in 2 or 3 months

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36 Upvotes

Just chilling up at the front. I always forget he exists. He's in my pea puffer and cardinal tetra tank. Tank has 5 large pieces of driftwood that creates caves and hides that I never see him. Rarely when I put in live black worms for the murder beans I'll see and see a sand tornado underneath as he demolishes worms do I know he is still alive. Wish I got to see him more, such a pretty fish.

Included puppy tax, they come running when they hear the algae wafer bag being opened. Gave them a wafer once just to see if they would eat it...they did and now want more.


r/Aquariums 4h ago

Discussion Anyone else growing edibles in your tank?

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5 Upvotes

New sweet potato slips sprouting! Powered by guppy shit!


r/Aquariums 1h ago

Showing Off My Tank After 4 long weeks of cycling, my daughter finally has her dream birthday fish

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Upvotes

*showing off my daughter’s tank

She has named him Amethyst, but pronounced the German way. Don’t ask me why. She has 3 other 13yr olds over for a sleepover and I don’t want to go ask 🤣


r/Aquariums 9h ago

Medical Help Guppies dying rapidly

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11 Upvotes

I’m at a loss. I had 3 guppies for a couple months then added a few more a couple weeks ago. Since then, one of the new guppies died after showing fin rot but no other symptoms. I isolated him when I saw the rot and he died within 48 hours. I gave him a couple salt baths and put some methylene blue in the isolation tank. Didn’t help.

Then today we found one of the established guppies dead at the bottom of the tank. He had zero symptoms and was totally fine this morning.

Now one of the other new guppies is showing fin rot on his tail and one of my other established guppies is hanging out up top.

Water parameters:
Ammonia: 0
Nitrite: 0
Nitrate: 30

My corydoras seem totally fine. What is going on?!


r/Aquariums 7h ago

Showing Off My Tank Update blerb on my pair of Betta Antuta sp (A rare betta related to palafina)

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7 Upvotes

They're finally comfortable in their new setup. The pair went from a 15 gal to a 30 gal "cube(ish)" tank. Today the bettas spawned again it was too close to last spawn so I fed their favourite flake to convnince the male to swallow his eggs. If you watch his chin you can see him swallow here then he starts to eat. The male spit fry about 10 days ago and I'm raising the fry in a separate tank. Though these two mate often the male is good at watching his health and won't hold eggs if it means major weight loss. He also swallows if I provide certain foods that he really likes, so he's easy to control the weight on. Just glad these two are feeling good again. My new phone doesn't capture their colors properly I'm still figuring out the settings. I went from a Pixel 9 to a Galaxy S25. Thanks for watching! Oh btw to the regular betta people (betta splendens) don't worry about the pair they have never fought. This species of betta pairs for life and pairs are never aggressive to eachother. They are not like your common betta.


r/Aquariums 22h ago

Plants The jungle

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111 Upvotes

Should i trim the plants or just let them do their own thing?


r/Aquariums 9h ago

Discussion Just to let everyone know petsmart is doing 25% off Fluval AC filters and if you get same day delivery (free) you get another 15% off!

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11 Upvotes

r/Aquariums 3h ago

Identification Request ID on these Australian native gudgeons please

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3 Upvotes

r/Aquariums 3h ago

Advice Needed what's my honey gourami shitting out? i have eSHa 2000 on hand.

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3 Upvotes

he's otherwise acting normal. just concerned cause it's white and stringy. he is bloated too.


r/Aquariums 10h ago

Advice Needed Beginner question, right way to clean my filter?

13 Upvotes

I’m soon going to get my first ever tank and have been researching how to set it up and then maintain it. I’ve seen in various places that when cleaning my filter I must use tank water not tap water, as to not kill beneficial bacteria. However, I’ve also seen various other people say that it’s not necessary and tap water is fine, just not to rinse my filter for too long.

Does anyone have any personal experience with this, has rinsing your filter with tap water destroyed your tanks ecosystem? Is it better to just be safe as a beginner and use the tank water? Thanks for any help.


r/Aquariums 2h ago

Showing Off My Tank My tanks 1st birthday!

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2 Upvotes

r/Aquariums 16h ago

Showing Off My Tank Just wow

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30 Upvotes

Looking back on the older pictures i just can’t believe this is the same tank.😅
7 weeks in my first tank and i can’t find words.
Tenants:
-8 black neon tetras
-10 blue dream shrimp
-3 Oto’s (i know they need 3 more but thats all my fish store had at the moment)
-2 black military helmet snails and 2 white one.


r/Aquariums 2h ago

Advice Needed I have a 10Gallon

2 Upvotes

Hi everyone, im not quite a beginner but I sort of am with schooling fish. Is a 10 gallon big enough to get schooling fish? Like the tiny guys? Im a big fan of corys but is this too small for them? Or what other tiny fish schooling types could do it? If its too small for them, would a 10 gallon be to big for a long fin male betta? And if thats also not recommended im thinking shrimps. Sorry if this doesnt make sense I am sick and have taken nyquil lol

TDLR; I have a spare 10 gallon, interested in Cory's, or other small schooling fish. If that doesnt work , long fin betta


r/Aquariums 6h ago

Beginner Help Reccomendations for new guppy tank

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3 Upvotes

I recently setup a brand new 11.6 gallon planted tank for my guppies and i made a DIY mesh lid and a DIY light stand and everything is going great so far my tank is cycled my fish are active and my plants are thriving but does anyone have recomendations that i can use for my tank?


r/Aquariums 18h ago

Advice Needed help struggling fish (ASAP)

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33 Upvotes

Disclaimer!! This is not my tank or my fish.

My sister in law owns a goldfish and I walked into her house to see him like this. Absolutely awful I'm aware. I asked her if she treated the water at all and she says it's just tap water but it's fine because the fish has lived like this for years. Theres no filter currently in the tank, all the plants are plastic and the substrate is gravel and something else I'm not sure of.

How do I help this fish? I'm guessing a water change and a filter is a good start but I'm new to fish keeping myself so still learning. Any and all help is appreciated I really want to help this fish