Questions tagged [aquarium]

Indoor containers holding water and creatures (fish, crustaceans, snails, etc.). For specificity, consider adding a "freshwater" or "saltwater" tag.

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25 views

Why is my Pleco turning white, how to improve his health

A few days ago I got a Pleco and some cherry shrimp for my aquarium. Due to my being a complete idiot, the bag with the Pleco fell while I was acclimating the shrimp. In order to keep it alive I put ...
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28 views

Black algae all over tank after 6 months

I started a planted tank with Monte Carlo. Everything was fine till first 4 months and the carpet was also coming up well. But after that black algae started to come all over the substrate and leaves. ...
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1answer
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What is this gray blob that suddenly appeared in my aquarium?

This blob of gray stuff has suddenly appeared in my 10 gallon aquarium where my kids' comet goldfish has been happily living for 6 months. I've also started to see some green algae form along the ...
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What happened to my clownfish?

I’ve had a nanotank for about 2 years now, and today something really strange happened. Yesterday, my clowns were totally fine, swimming and eating like normal. Today I went to feed them this morning ...
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3answers
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What is this whitish goo in my newly set up tank?

I set up my first tank (50 liters cube) about 4 days ago. It's quite high-tech: CO2 Macro + Micro fertilizers 6h / day lightening I added some aquarium starter fluid Decent filter with a bunch of ...
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28 views

Molly's belly is still inflated after giving birth [duplicate]

One of my molly just gave birth to 4 fry. Her belly is still inflated just as it was before giving birth. I was waiting if she's gonna release more babies. She hasn't. She just stay at the bottom of ...
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4answers
275 views

Can my fish survive without filter?

Hey I have 50l aquarium with 2 goldfish, temperature is always 25°C and my question is will they survive without filter?
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1answer
29 views

Beta fish sleeping or sick? [duplicate]

I have had my Beta fish for almost 2 years, he didn’t look great when I first got him but after 1 week I got a 5 gallon tank with a low flow filter and a heater. He has since then always ate well and ...
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I'm willing to use CO2 tablets in my planted aquarium but I'm worried that it may cause any harm to my guppy fish

If there is anyone who knows about planted aquarium please help me. Is ISTA CO2 tablets good for planted aquarium? Will this harm my fishes? Should I use both CO2 and oxygen filter in my tank?
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1answer
37 views

What amount of “grime” is acceptable in betta tank post water change?

There is always always always stuff in my betta’s tank, and it of course gets stirred up after water changes. I always vacuum up the waste I can find and clean out dead plant matter. But no amount of ...
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1answer
89 views

My goldfish is dying

I had 2 goldfishes for 2 years in my aquarium. This one was good last night. Idk what happened today it is somehow floating on side with little movement, like sleeping. I put it outside of aquarium ...
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1answer
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My 18 year old Musk turtle has some soft areas on his plastron

My 18 year old Musk turtle has some soft areas on his plastron. They also bend a bit. Is this ok? There are no exotic vets in my area so I am not sure what to. He eats dry turtle pellets and he has ...
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2answers
64 views

How do I save my betta fish from dying because of a dirty tank? [duplicate]

I have a betta fish and I keep him in a gallon tank with a water filter. There has been algae growing in his tank but I thought it was normal and didn't pay mind to it. Today I see the water is cloudy ...
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1answer
43 views

What aquarium plant is this?

I got this potted aquarium plant (unmarked) from my local fish store a few weeks ago thinking it was Helanthium tenellum, but now that it's growing out a bit i'm not sure what it is. Would anyone be ...
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1answer
26 views

How to transfer established saltwater into a bigger tank?

I setup a 5.5 gallon tank and just purchased an 8 gallon tank. What's the easiest way to move the saltwater from the old tank into the new tank without screwing up the salinity levels? I wasn't sure ...
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1answer
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aquarium - “full” ecosystem?

Starting from this question I have another one. I was not able to find an answer, although it might exist. Is it possible to populate a fish aquarium in such way that it requires "zero" maintenance? ...
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blackworms and aquariums

I just started to study the topic of cold water aquariums. I ended up quite quickly to this site, offering some insight on how to grow blackworms as food for fish. The end of the story gave me mixed ...
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When (or If) to reseal an sump?

I bought a glass sump (intended for a fresh-water tank) 2nd hand that has clearly been put together at home. The construction looks great, but you can tell its homemade since the seal has "frayed ...
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70 views

Reasons for killer fishes?

I've got a recurring problem with killer fish. In the last 3 years I repeatedly had recurring sudden spikes in fish deaths. Via pure coincidence I found out that it was no strange sickness or water ...
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0answers
60 views

What are these little creatures in my aquarium?

I have recently noticed these tiny creatures on the glass and other surfaces in my aquarium. What are they, and where could they have come from? They are about the size of a sesame seed and growing. ...
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2answers
116 views

My brand new goldfish is gasping for air

Today I went to the pet shop and got a goldfish. My tank is 20litres and the goldfish is pretty small. When I first got the fish it was gasping and eating the bubbles in the bag I thought this was ...
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1answer
57 views

Fish needs light in its tank or not

Do fish need light in their aquarium? I have a fish tank in which there are approximately 10 fish. There is a light on the top of the tank, which I keep on during evening time. I Do not know ...
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1answer
34 views

How to set the temperature on an Eheim aquarium thermostat?

I'm using an Eheim thermocontrol 50W thermostat in my 60l freshwater aquarium. The official manual and dozens of forum posts state that the temperature is set by turning the outer blue wheel to the ...
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2answers
44 views

What could I use to clean limescale off of tank glass?

My turtle tank is half of its height filled with water. Where the filtered water falls from the pipe into the water, there is a lot of limescale on the glass. What tools (sponge, brush...) could I ...
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50 views

My empty but not empty fish tank

My Betta died a couple weeks ago so now i have a tank filled with water, can my small female goldfish be in the small rectangular container that has rocks a cave and a sea anemone, and this tank has ...
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1answer
38 views

Ich control in tanks, nitrites and nitrates

I have recently returned my fish to my main tank, a 65g, after treating two weeks for ich. Two days after treatment ended, I transferred my larger fish home to a fully planted tank. Yay, no flashing! ...
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21 views

Efficient aquarium cooler [duplicate]

I wonder if it'd be a good idea to cool an aquarium with an external source of water, e.g., pool water. Because my tank runs hot in summer (~30C) and needs to be brought down to 25C, I was thinking if ...
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15 views

Will ich medicine harm my betta if he doesnt actually have ich?

A few days ago I noticed a spot on my betta's side just next to his gills. It wasnt completely white in color but definitely lighter than the rest of his body. I tested his water and there was an ...
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2answers
123 views

What's wrong with my snails' tentacles?

I've had an exclusive snail tank set up for several months, housing bladder snails, pond snails, MTS, and ramshorn snails. It has been going well up until this point. Recently, I've noticed that ...
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2answers
72 views

guppie male harassing females

Background I have 2 female guppies in a ~60 L planted aquarium, temperature ~25 deg C, internal filter, relatively hard (but not too hard) water. They've been on a diet of standard flakes. Change ...
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18 views

Betta fish with black dots on his body after vacation [duplicate]

Hello, I’ve just gotten back home after being gone for a month and I noticed that my Betta has black spots on his body, not his fins and I searched it up but I couldn’t find anything about it. When I ...
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1answer
122 views

Why do my aquarium plants appear like they are mummified?

My 20 gallon tank is 6 months old. I haven't had too many problems with it, just a few diatoms 2 months into cycling it. I added 4 Serpae tetras, a Golden algae eater, 2 shrimp and an Assassin snail ...
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2answers
41 views

Setting up new fish tank for new fish - will using decor from my existing tank help spur the bacteria growth process?

The guy at petsmart told me if I used the bacteria-established cartridge filter from my existing tank in the filter of the new one for a few days, it would help set up the bacteria (this is all before ...
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33 views

Why is he so small?

it’s kinda hard to see, but my flame tetras is super small! I do not know the gender of all of my fish, but 5 of my tetras are roughly the same size, but my 6’th one is really small. When I feed them, ...
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1answer
34 views

Why are my 6 flame tetras not swimming like normal?

Usually I see my 6 flame tetras cooped up in the low corners of my tank. The water temp is perfect, and I am working hard to get the perfect pH level, but when I look at my fish, the’re always either ...
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3answers
51 views

ADF and Mystery Snail Emergency Tank Transfer

Late last night, I noticed ich on my neons. I bought medicine, but before I added it I noticed that it was not suitable for frogs and snails. I had some de-chlorinated water handy, so I dumped the ...
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1answer
64 views

What are these?

(click to enlarge) I have been seeing these around my tank, above and he waterline! They move, and if cut in half, they duplicate. They do NOT have a triangle head. If they get in the water they are ...
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2answers
84 views

What is my apple mystery snail doing? (Male)

After a day, when I turn on the fish light, I see him rush to the glass. He goes up... and does what is in the pic! He keeps getting farther and farther off of the glass!! If he falls he goes back up! ...
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2answers
172 views

Cooling aquarium with aluminum heat sink

Summer is approaching again. Last summer, I had a lot of trouble keeping the temperature in my aquarium at 30°C. My fish prefer 21-24°C, but I couldn't get it any lower than 30. So I want to avoid ...
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32 views

Neon tetra left fin looks snapped and white

Hi I have 6 neon tetras in a 29-gallon tank. I noticed one of them has the left fin looking like snapped to the side and white. It swims well and eats well. No sign of discomfort from that fish. Any ...
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1answer
58 views

Broke my Seapora AquariumController. What are my options?

I'm a fool and dropped the controller. The people at the store I bought it from didn't really have a solution on how to resolve this...anyone know how I should go about replacing it? thanks!
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1answer
72 views

Can you use super glue on outside of fish tank?

Trim of my fish tank is leaking. Can you use super glue on outside of fish tank?
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2answers
73 views

Can I fill my aquarium with the water from a purifier?

I only have a bore well in my home so I bought an 8 stage water purifier with RA And UV which adds minerals to the water. The final water TDS Is 44. I'm keeping tropical fish such as guppies and Angel ...
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2answers
69 views

is this overflow system gonna work?

I'm planning to make this overflow for my tank. the goal is to drain from bottom. in theory it will work but in real world i'm a bit worried about the noise that "air in" is going to make and where ...
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4answers
69 views

How to raise PH in RO water? (with chemical compounds no commercial products)

I am using RO water for my newly started 100 lt aquarium and it results to a Ph of 6-6.2 which is too low considering that KH is 0. In this case, I need something to raise PH (and KH eventually). ...
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1answer
54 views

Using glass pipe

I want to use glass pipe instead of a regular fitting for bottom drain of my aquarium. for example 10cm of glass pipe that glued to the bottom hole of aquarium using silicon sealant and the end of it ...
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1answer
254 views

Betta died of fungal infection, when can I add a new betta?

My little betta passed away after a long struggle of being sick, getting better, being sick. He finally developed a fungal infection that I couldn't kick and he passed away. In the immediate moments ...
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1answer
120 views

How do I maintain a population of daphnia inside a filtered tank

I have an aquarium with a HOB filter. I tried to introduce a large population of daphnia to the tank, but by the next day, they had all been either eaten or filtered out. Is there any way to maintain ...
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1answer
61 views

If the water quality is already perfect, do I need to wait any longer?

I just set up a small 23 liter aquarium for red fire shrimps. There is no shrimps in there. I filled up the tank with water from a rain collector and mixed it with some mineralised water. This has ...
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1answer
156 views

Why does my African Clawed Frog keeps banging into the tank glass and pawing at the corners with his front feet?

I just recently got an african clawed frog which I rescued from being dissected. He used to live in a large plastic bin with 3 other frogs and sometimes I'd see them nipping at each other. He keeps ...

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