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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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12 views

What is a safe paint to use in an aquarium?

I am building a wooden lid for my tank. I want to paint the interior that may touch the water white. I wish to stain and paint the rest clear. What paint is safe to do this?
0 votes
0 answers
16 views

is your octopus squirting water at you? [closed]

it is that the octopus will squirt water at the first human face,so be warned.
4 votes
1 answer
154 views

Whats wrong with my danio?

I have a 29 gallon, planted tropical aquarium with 6 assorted danios, two golden bristlenose, and three rainbow kribs (two female and one male) Ammonia... 0 ppm Nitrites...0 ppm Nitrates... 0-5ppm Ph....
0 votes
1 answer
222 views

What happened to my betta fish?

I recently bought a platnium betta male who just passed. I had him in a tank with 2 mollies and a female betta, but they all seemed to get along perfectly. I do believe that I should've taken the ...
3 votes
1 answer
55 views

Goldfish constantly gulping but not eating

We are in the middle of a first time fish-in cycle (an aquarium gift from a well-meaning grandparent). We have a 2 inch Comet goldfish, who has been surviving the ordeal like a champ... until today. ...
3 votes
1 answer
7k views

Gourami breathing at water's surface

I've had a pair of Pearl Gouramis and another pair of Opaline Gouramis for a few months now and, unlike any of my other fish (Tetras, Rainbow, Loaches), they spend time at the surface breathing the ...
6 votes
3 answers
1k views

Can too much light kill fish?

I have a 20 L aquarium, mechanical filter, lights with timer, everything was fine. Since the (live) plants were not "too" alive, I upgraded the light. Instead of the generic LED lamp ...
0 votes
0 answers
28 views

Is my platy still pregnant?

First time trying to keep fry alive here so have been keeping an eye on this mummy fish. A few days ago she looked alot "rounder" now she appears a little flat? I'm aware they get a boxy ...
2 votes
1 answer
1k views

Is my guppy healthy? Its colour is weird

I just bought a male and female guppy, and the male guppy is really small, probably a month or two old. This is my first time getting a fish. The male guppy seems to have a black spot near his head. ...
3 votes
1 answer
290 views

Is this a planaria?

This morning I have found a lot of small white worms hanging around the walls of my fish tank. Do you know what it is? It might be a planaria, but I am not sure. Should I be concerned?
3 votes
1 answer
73 views

How to properly lower PH while cycling a tank?

So I am a one time betta owner and while I fell like I did alright with my last Betta (his name was Columbus and he lived a happy three years with me) I really want my next fish to have a wonderful ...
1 vote
0 answers
75 views

Molly fish still has popeye after numerous water changes and medication

I have some black mollies that developed popeye. I noticed a subtle white area toward the back of their body (that doesn't look like fungus or ich), and there's possible inflammation of their gills. ...
0 votes
1 answer
48 views

Can I use garden soil for aquascape?

I have some excess garden soil with goat’s poop in it. I was wondering if I could use it as an aquarium substrate, because I want to plant some easy-growing aquatic plants in my aquariums. Aquarium ...
0 votes
0 answers
33 views

Does anyone know this aquatic plant?

Does anyone know this plants? And will it grow sideways?
2 votes
2 answers
156 views

Algae will not go away!!!! And snails, too!

Images, regional, and general info: Image 1: Strands of dark-green algae are attached to the bottom and floating in the air; algae all over the plants. Image 2: Over-rich substrate? When I hold the ...
1 vote
0 answers
322 views

Can tapeworms from brine shrimp cause infection to humans or to fish?

I have angelfish which laid eggs which turned into fry. I am feeding them with baby brine shrimp. We all know that brine shrimps (especially the ones which look orange and often used for fish feed) ...
1 vote
0 answers
41 views

Why does my goldfish have red under their chin, like a graze?

I've been lumped with caring for the office goldfish tank. Trying to do my best, I've cared for tropicals before. One of the goldfish in the tank, my favourite, has recently started developing a ...
4 votes
1 answer
835 views

Film on surface of female betta tank

I recently took in one of my friend's male Bettas to treat it for ich (Ichthyophthirius infection). When I brought him back I noticed a film on the surface of her other Betta's tank (this one is a ...
0 votes
0 answers
58 views

New Molly babies

I bought a Dalmatian Molly today. She is the only fish on the tank. She’s only been in her tank 5 hours and I just got home and found 3 babies. Stores are closed as it’s late Sunday night. What do I ...
2 votes
0 answers
34 views

Treating columnaris in aquarium

I have a 100L aquarium with 11x melanotaenias boesemani and 15x corydoras (5x each of bronze, pepper, julii). A few days ago I noticed several patches of white film on one of the juliis and it seems ...
3 votes
1 answer
79 views

Red fin-like protrusions from gils

[New aquarium owner. Pardon any lack of basic knowledge or incorrect terminology.] My fish has some weird red protrusions coming out from the bottom part of its gills that look like either "...
1 vote
1 answer
373 views

Povidone iodine for fish Mycobacterium?

I may have rescued a betta that has Mycobacterium. He is currently in a clear plastic tote in 1 gallon water. I feel so bad for him, that I want to move him to a 5 gallon tank. While I researched ...
3 votes
1 answer
270 views

What is the point of substrate in a fish tank?

There are many different kinds of substrates available for fish tanks (i.e. sand, gravel). I've even heard some people say they don't use any substrate for some of their tanks. Is the substrate in a ...
2 votes
1 answer
621 views

Noisy canister not pumping

I've had this Sunsun 304b canister for a few years now. It was very quiet originally but in the last few years has gotten noisy. And then two weeks ago it stopped pumping suddenly making a loud ...
0 votes
1 answer
93 views

disappearing hermit crab? [duplicate]

I was spraying and feeding my crabs last night when I realized there was one missing. I only have 3 hermit crabs now so every-time I go over to them I check and just make sure I can see them or where ...
3 votes
1 answer
373 views

Help me sex this Endler's livebearer

It looks like a female (no colors and round belly), but it seems to have a gonopodium organ, a dot on the tail-fin that other females lack and the gravid spots near its vent are fainter and higher up ...
0 votes
3 answers
90 views

Does old glass in an aquarium affect the water color?

I have a very old tank. We cleaned the tank out thoroughly by doing the following. Took out the old gravel and replaced it. Scrubbed the walls of the tank as well. Despite that, the water is still a ...
14 votes
5 answers
30k views

Which shrimp will co-exist with my loaches and schooling fish?

I plan to keep about 4 yo-yo loaches and a few shoals of schooling fish (neon tetras, danios, mollies, and maybe more smaller fish) in my tank. I heard that ghost shrimp eat small fish. What type ...
2 votes
2 answers
9k views

Acceptable temperature shock for aquarium water changes

It's generally accepted that it's good to get the temperature of your new water to match the temperature of the tank water before introducing it. You don't want to change the temperature of the ...
2 votes
1 answer
168 views

How to feed a Pleco in a community tank?

I got a Pleco to control brown algae in my community tank (3 female Bettas, 1 Pleco). At this point, the algae is largely controlled, which leaves another problem: I need to increase supplemental ...
0 votes
1 answer
72 views

Brown silt forming ontop of aquasoil?

I have a 55 gallon freshwater tank with ADA aquasoil and have noticed that the dirt has started to have some type of brown silt forming ontop of it. It's not spread throughout the entire tank, I ...
12 votes
4 answers
6k views

How long should I wait after moving aquarium before adding new fish?

I recently moved my established aquarium from one room to another in the house. I had to remove most of the water so that I could lift the aquarium (with help!). Once in the new location, I returned ...
4 votes
3 answers
1k views

Nitrogen cycle for new fish tank

I recently bought a fish tank. I googled about basics for setting up a fish tank. Almost every webpages help me to understand how important the nitrogen cycle is for a healthy fish tank. So I decided ...
0 votes
0 answers
96 views

Male Platy clamping fins and hiding

I got 7 coral red platy for a planted ten gallon tank about two months ago. The water conditions are very good and the temperature is 76. I have 3 males and 4 females, and they have been breeding so I ...
0 votes
1 answer
95 views

What type of snail is this?

I bought some fish from a pet store and a few weeks later I noticed that there were a few snails in my tank and now it has been 2 months since I bought them home and there are a lot more then what I ...
0 votes
0 answers
46 views

What Type of Goumi is this?

I have 1 goumi and I can't figure out what type he is? I think that it could be a Red Fire Dwarf Gourami but not sure.
0 votes
0 answers
72 views

Medicine for Aquarium Fish wound

Any tips on how to treat the fish's wound in the linked photo, including what medication to use? Additionally, I'm new at making fish and I've only had my new fish for three days. I only became aware ...
2 votes
2 answers
3k views

Why are my fish always scared?

I have a tank with four 1.5" Shubunkins, which I've had for one month. There are no other fish. It is a glass-bottom tank with no substrate (for easy cleaning), and has many floating plants for them ...
1 vote
1 answer
106 views

Why are the leaves of my aquatic plant still yellowing in spite of fertilizing them?

I have a 29-gallon planted tank with mollies, mystery snails, and several live plants. One of my plants has been showing signs of yellowing leaves: I use Seachem's Potassium, Nitrogen, Phosphate, and ...
6 votes
1 answer
6k views

Is my red tailed shark sick or pregnant?

Yesterday the fishes in my tank were visually ok, today I noticed that one of my red tailed sharks has a bulky belly. Are they sick or pregnant? Here are pictures of the two "normal" ones, and the ...
2 votes
0 answers
175 views

What is the maximum size Plecostomus that can be kept in a 30 gallon tank?

We have a regular 30-gallon fish tank. We have two Plecostomus fish, and they are about 9 inches long. We feed them algae pellets regularly. They have been 9 inches long for years. We monitor the ...
1 vote
0 answers
33 views

Beginner level community fish tank

I am planning to set up a 40 gallon(breeder) fish tank to house easy beginner level fishes. I want to go with small fishes. Below are the max combination i came up after researching. 6 - neon tetra 2 ...
1 vote
2 answers
73 views

Identify filter for fish tank?

I have a filter since some years now. Now I need some part for repair. But I can not find any print on it to identify the company. Maybe someone knows more about it. It is green, looks technical ...
0 votes
0 answers
37 views

Treating a sick Angel fish

My Angel fish has two pink growths on either side where her dorsal fins were. The fins are now missing. The guy in the fish shop said it looks like a bacterial infection and sold me some Erythromycin. ...
1 vote
0 answers
279 views

Does a chipped glass corner/edge compromise integrity on a rimless aquarium cover?

I received a rimless aquarium and lid that were damaged in shipping. The lid was chipped on the very corner, and I'm working on a resolution with the seller. My understanding is that some glass (...
1 vote
1 answer
1k views

Can you help me identify baby snails in my freshwater aquarium?

I have a freshwater aquarium which I added plants and two nerite snails to approximately two weeks ago. Today I noticed two baby snails -- one about 2mm long, the other about 1mm. As noted I do ...
4 votes
3 answers
6k views

Did my catfish kill my betta

I have a 4 gallon small tank and a larger 15 gallon tank. In the smaller tank I have a couple of guppies, a sailfin catfish and a male fighter. I have kept this combination of fish before without any ...
3 votes
0 answers
144 views

Weird cocoon like thing in aquarium

I have a 60 liter aquarium with platies, guppies, neon tetras and some shrimp. I have a couple different plants (don't know the names). Today I noticed the following on one of the plants: It's about ...
2 votes
1 answer
73 views

How much does feeding amount relate to Platy fish population?

I've a 200L fish tank with Platys breeding in it for a couple of years now. While I started with a reasonably small number, I think there are around 30 breeding sized fish in there now plus all their ...
1 vote
1 answer
1k 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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