Pets Stack Exchange
Pets Stack Exchange

Questions tagged [aquarium]

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

Indoor containers, vivariums, which hold water and aquatic creatures (, crustaceans, , etc.)

Sample questions might discuss set-up, environment , and for residents.

If useful, consider one or more descriptive tags to distinguish aquarium type: , or .

For the purpose of this tag, aquariums are defined as indoor containers of any size. Use for questions about outdoor containers.

Non-aquatic vivariums should use the tag.

660 questions
25
votes
4 answers

Are there health risks to leaving a dead fish in the aquarium?

Sometimes one fish dies, without any apparent disease. In previous aquariums I would always remove them as fast as I could. Now my aquarium is a bit bigger, and I have some laziness to remove those bodies: they are too deep, or in the back, or…
woliveirajr
  • 4,044
  • 4
  • 31
  • 53
24
votes
3 answers

How can I permanently reduce the pH level of my aquarium?

I have an aquarium with some rocks and substrate mixture, and about 15 small fishes. The pH level of the water is always high (7.6 - 8), away from the recommended value for the fishes I have. I want to fix the pH level permanently; I don't want to…
woliveirajr
  • 4,044
  • 4
  • 31
  • 53
23
votes
7 answers

Cooling a goldfish tank during summer

During the peak of last summer we had several goldfish that died after several days of hot weather and I suspect it was related. According to the Goldfish article on Wikipedia: Extremely high temperatures (over 30°C (86°F) can also harm…
PeterJ
  • 1,324
  • 5
  • 15
  • 34
21
votes
2 answers

Do fish need a dark environment at night?

Is it bad if I accidentally leave the lights lit on a fish tank overnight? Or do the fish not care whether it is light or dark?
Timtech
  • 3,271
  • 6
  • 25
  • 48
20
votes
4 answers

What is the maximum proportion of fish per liter in an aquarium?

How many fish can I have per liter in my aquarium, or how much water should I have for each fish? For specimens like Black tetra and Neon, that don´t require that much space and can coexist with other fish.
woliveirajr
  • 4,044
  • 4
  • 31
  • 53
20
votes
2 answers

Why don't fish grow to their full size in a small tank?

I have heard that when a fish is kept in an aquarium that is too small for the fish to grow to its full size, it will only grow to a portion of its possible size and its lifespan will be shorter than it would normally be. If this is true, why does…
Jacob B
  • 657
  • 1
  • 10
  • 30
20
votes
2 answers

What's the least painful way to euthanize a fish?

My aquarium fish is sick and I don't know the least painful way of putting it down. How should I kill it so that it doesn't suffer?
Raystafarian
  • 1,116
  • 1
  • 8
  • 18
20
votes
2 answers

Where did my danio fish mysteriously disappear to?

I have 8 white skirt tetras, 8 albino cory cats, and had 8 danios. Now I have 7 danios. One mysteriously disappeared. I am very doubtful it is hiding because my danios don't do that; all they do is swim at the surface. It is impossible for the fish…
Don Larynx
  • 1,757
  • 6
  • 18
  • 34
18
votes
8 answers

Adding neon tetras to an existing school - Any concerns?

I have three neon tetras and I'd like to add some more. My reading on the subject gives me different advice on what is likely to happen. One outcome is the two sets of neons will not school together, the other outcome is that they will school…
Nicholas
  • 591
  • 2
  • 5
  • 11
17
votes
3 answers

How does one effectively "cycle" an aquarium?

I have read that prior to putting fish in an aquarium, one must "cycle" the tank so that bacteria that oxidize ammonia will produce nitrite, and nitrite-oxidizing bacteria will make nitrate. I understand the chemistry behind it, but I'm not really…
Peter Grace
  • 495
  • 1
  • 3
  • 8
17
votes
4 answers

Is it true that goldfish growth is limited by container size?

As I grew up, I was taught that a goldfish will only grow to a certain point dependent upon the size of their container and how many fish are in the container; all the fish within the same container would be limited by this rule. Is it true that the…
user6796
16
votes
1 answer

Do I need a bubbler in my aquarium?

I have an aquarium of 280 liters (~ 74 gallons). I use an external filter, so the water returns to it like a small waterfall. Do I need a bubbler to improve the O2 level of my aquarium, or adding one would cause some undesirable effect on an already…
woliveirajr
  • 4,044
  • 4
  • 31
  • 53
16
votes
4 answers

What are some effective non-chemical methods for controlling the snail population in an aquarium?

I always had problems with snails in my aquarium. They reproduce faster than I can remove them. Last time I had such problem it was solved by restarting my aquarium: took all the water of it, throw away plants, sterilized stones and wood with…
woliveirajr
  • 4,044
  • 4
  • 31
  • 53
16
votes
3 answers

How do I control the convict fish population of my aquarium?

I made the mistake of introducing convict cichlids to my aquarium from a friend who was trying to get rid of them (should have been a big tip-off). Over time, these things overtook my tank and are breeding out of control. I'm sure I could find out…
JohnFx
  • 878
  • 8
  • 20
16
votes
3 answers

Can I make my own driftwood for my fish tank?

Driftwood is expensive to buy at the store. If I find a piece of wood I really like, is it possible to make it into driftwood than can be safely used in my fish tank?
Spidercat
  • 15,602
  • 20
  • 74
  • 155
1
2 3
…
43 44