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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1answer
169 views

Is it safe to feed mosquito larvae to my fish?

A long time ago, I had a small fish that would not eat any fish flakes/pellets, So I tried my luck with mosquito larvae from outside. It ate those just fine, and after a while, I was able to transfer ...
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Female Guppy Health Question

I went to feed my fish and I always check on my female guppies because they are the smallest in my community tank. I saw that one of my female’s gravid spot was a “odd” color to me. It is usually a ...
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1answer
47 views

I want to be prepared for my fish

For some time, I've been obsessed with the idea of getting a pet. It took me some time to decide which one I really want, and I decided on fish. However, it needs some proper preparations like an ...
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44 views

White patch and spot on my goldfish?

One of my goldfish, which I've had for 3 months, suddenly got a white patch on the top and a white spot on its left side (the yellow-black one in the picture). I just noticed it today, but I'm sure it ...
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56 views

Is My Guppy Sick?

My adult guppy has been acting strange in my opinion. He has been inactive unlike the other guppies and platy fish in the tank. I’ve noticed that he has been swimming in place at the top of the tank. ...
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33 views

Digital pH Tester - fish tank

Is there any digital pH tester on the market at all? I've done a search around and pet-stores and the usual companies (Fluval, API, etc) don't sell them as far as I can tell. Some companies I don't ...
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38 views

Best Brown Algae Eaters for Freshwater

I have brown algae growing in my tank and I was wondering if Cory Catfish could clean it. If they could not, what other fish, besides shrimp and plecos, could clean the algae? Just a note, my tank is ...
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1answer
97 views

What is this alien in my shrimp tank?

The tank is set up since nearly two months now. The shrimp have been in it for around four weeks. One small algae eating fish and one big and accidentally some small snails are living there too. But ...
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1answer
43 views

How do I remove hair algae from my fish tank?

I have a 5-gallon tank that has a betta, a few live plants, and a hiding place that I have had up and running since August, the fish has been in there since September. A few weeks after adding the ...
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34 views

Fins coming out like tearing apart from body of Betta [duplicate]

It's been 2 months since I brought the betta and recently I noticed that it was lying on the bottom being very inactive; seeing this, we changed it to a bowl and changed the water, added almond leaves ...
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1answer
225 views

What is special about an aquarium using no CO₂, no fertilizer and no filter?

A random video on Youtube presents itself with the following title: 24th Month – (Carrot Feeding Frenzy) NO filter, NO CO2, NO Ferts 5 Gallon Nano Tank Presumably having no filter, no CO2 and no ...
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2answers
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Why are undergravel aquarium filters no longer popular at stores?

I recall that when I started fish keeping, there were basically two choices for filtration: under-gravel filters and hang-on backs. There were also expensive canisters for people with large setups. ...
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1answer
53 views

Can't reduce my nitrite/nitrate levels, any help appreciated!

I set a 60 litre tank up and run it for 3 weeks, all water parameter levels fine. Added 4 fish, left 4 week's all fine. Added 4 fish again and 5 days later fish started to die. Checked levels and the ...
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65 views

How much space does a fish need?

I am wondering if there is any accurate way to determine how much space any particular fish needs. I have heard things like 1 gallon per inch of fish, but this cannot be accurate as a betta (2.25 ...
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22 views

If i have sand substrate will my good bacteria beneath the sand still get fed?

I just put power sand, pumice for living bacteria, then on top of it hard sand, then the toppest is full the finest granule sand. I filled the water and now wait to cycle the tank. I wonder whether ...
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53 views

Goldfish skin around the intestine area is gone and stomach looks to be caved in

This is my first time posting so I’m sorry if I made any mistakes with my post. I think I’m going to lose one of my goldfish. About 2-3 weeks ago both of my goldfish (I only have 2) developed ammonia ...
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80 views

What should I do to my goldfish swimming on surface?

I am new to goldfish, it is swimming on surface like gasping for air every 3 minutes or so. So, I did 40% water change, using drinking water just now. Should I do something else? There is 24/7 filter ...
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1answer
8k views

My fish are disappearing :(

I have a 10 gallon tank I had 3 guppies and some snails. Only 2 adult snails and some babies. I had 3 guppies the night before and the next day one of my guppies disappeared. This has happened before ...
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1answer
46 views

Can I fertilize aquarium plants in a similar way to garden plants?

For most fertilizers used with garden plants, they are labeled with percentages of nitrogen, phosphorus, and potassium. Nitrogen is good for helping the tops of the plants grow nice and green, the ...
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1answer
30 views

How to safely get iron to aquarium plants?

I have a planted aquarium that I've been working on for a while and I'm still trying to get my plants to grow nicely. From doing a bit or research, I believe that my aquarium plants may need ...
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82 views

What should I do about my Siamese algae eater fish missing?

I put 1 Siamese algae eater fish in my 10 gallon (38 liters) tank aquascape with no fish yet, last night, until now it's been missing. What should I do?
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26 views

What do I do about nematodes (roundworms) in aquascape?

I have 10 gallon (38 liters) tank aquascape, no fish yet, I noticed around 20 nematodes swimming around, can I just put platy fish and shrimp there? How do I get rid of the nematodes?
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Pregnant platy, what should I do? [duplicate]

I have a platy that is pregnant. I used to have her outside in a little pond (a bath tub), but put her inside by herself in a 5 gallon (19 liters) aquarium, so the babies don't get eaten by the other ...
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2answers
47 views

How to identify metal toxicity in aquarium

Related to this question: If I start experimenting with metals for aquariums, how can I detect that the metal is causing the problems? I want to clearly identify the metal toxicity from wrong pH, ...
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1answer
63 views

Why are my Betta’s fins curled and maybe spotted?

I bought a Betta for my daughter that has quickly become my 5th child. We bought him from Petsmart, as I knew little about where else to go - especially with Covid19. He is in a 3.5 gallon (13 liters) ...
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2answers
65 views

Why is aquarium siphon so slow?

I bought an aquarium siphon for water changes. I purchased the extra large size, which has a 1.5 ft (46 cm) long vacuum tube, and which comes with a squeeze valve to get the siphon started. When I ...
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52 views

What is this fish disease?

I had 4 platies and 5 danios but there are only 1 platy and 4 danios left. mysteriously, they die in the same manner, like sinking to the bottom of the tank and resting there. I was wondering if they ...
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29 views

Advice on sick Betta. Possible Dropsy?

About a week ago I noticed my betta, Florence, had a lump on his right side. In the days prior he was very slim and active. On the day of finding it I noticed he was still normal, his appetite hadn't ...
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2answers
97 views

How often to do water change for betta fish

How often should I be doing water change for my betta? My wife seems to think it should be done pretty often.
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29 views

Separating the fry from parents - German Blue Ram

If I leave the eggs to hatch with parents and let the parents raise the fry, when should I take the fries out? I mean, for how long they can live with their parents? I know at some point parents will ...
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1answer
62 views

Suggest purchase a pet fish from a four-star online store?

Due to the currently pandemic we are in, one of my wife's friend gave us her fish tank and its supplies. We have two boys and they like fish. I, myself, do not like Petco or Petsmart store that sells ...
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1answer
55 views

Transferring my tetras and rasboras to a bigger tank

I am moving my Harlequin Rasboras, Neon Tetras, and Skirt Tetras from a (44 Liter)11.5 gallon tank to a (76 Liter) 20 gallon tank. I would like to know if I HAVE to bring the same gravel from the 11.5 ...
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1k views

Are rocks that are breaking apart bad for aquarium use?

I'm planning a new, 50 gallons (around 190 liters) aquarium and I found very nice looking, red rocks on the shore of the St. Lawrence river, close to where I live. I cleaned them (bleach, brushing) ...
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42 views

Nitrates spike right after a 50% water change (ammonia,nitrite and nitrate readings were all zero before it)

Need help in a situation I'm a bit puzzled with. I have an established, 3 foot (90 cm) bare aquarium with discus. I have added a few plants in the last 3 months. Once the new plants have adapted to ...
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2answers
71 views

What bottom feeders are good for a 5-gallon fish tank?

I have a 5-gallon (19 liters) fish tank, with two neon tetras in it, and I am going to Petco in the future to get more fish. I was thinking about more neon tetras and some sort of bottom feeder. Are ...
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36 views

Are either of my guppies pregnant? [duplicate]

Bottom one seems to be, but I'm not positive. Please help me, I need to know before she pops!
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1answer
46 views

Metals and aquariums

Please do not ask me the "why" for this question, I am not 100% sure myself. I just brainstorm. I know that metals are usually a NO-NO for aquariums - because they can release oxides and ...
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1answer
45 views

Goldfish with intermittent swim bladder problems

I have an 11 year old common goldfish and he has recently been having some swimming issues-but only in deep water after a few hours. He is fine in shallow water and he can swim fine for about 8-9 ...
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1answer
50 views

8.0ppm ammonia spike that's been “in effect” for about a week or two

OK, so I went into fish keeping way too fast with almost no knowledge. I will give a short rundown of what happened in my tank. I got a 5 gallon (19 liters) tank and a silver molly and a leopard ...
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31 views

What might cause a Celestial Pearl Danio to go off their food?

Overview One of my celestial pearl danios (CPD) has gone off their food and is skinny. Whilst it might be too late for him, I want to save the other 5 CPDs in the tank. Any ideas? Background and ...
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2answers
5k views

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 ...
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2answers
139 views

What soil should I use for a dirted aquarium?

I am preparing to make a dirted aquarium. I have some CaribSea eco-complete substrate which I will be putting on top of a layer of soil in my 10 gallon tank. I am considering using Miracle-Gro ...
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1answer
45 views

Are German blue rams canibals

Do german blue rams eat other german blue rams' fries? I mean not their own fries but the same species fries.
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1answer
143 views

German blue rams behaviour and sexing

I have bought 4 German blue rams from two different shops, hoping I can’t get a pair from them and now I have a few questions. Do females show aggression? Could females chase other rams? If two of ...
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2answers
89 views

Can I put resin aquarium ornaments in boiling water for sterilization?

First of all, I'm not an English native user, so the sentences are not as clear as you would like. Sorry for that. Yesterday I got some second-hand ornaments that I could put into my home aquarium to ...
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40 views

Gravid female red eared slider

So it's the time of the year where last year on April 29,2019 my female red eared slider who is turning 4 soon layed her eggs but this time she hasn't. I moved her to her nesting area today (29th ...
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1answer
65 views

Odd-sized aquarium with damaged canopy: what are my options?

I've recently come into possession of a used aquarium; while it includes all the basic parts (tank, stand, hood, and canopy), the glass canopy was dropped at some point and a chunk is missing out of ...
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0answers
37 views

Aquarium ammonia question

My wife and I purchased a small 5.5 gallon aquarium: Top Fin Starter Kit with a silent-stream carbon filter. We are brand new with aquariums and unfortunately didn't do our due diligence and research ...
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0answers
25 views

My betta is acting strange, loss of appetite and won't eat pellets! [duplicate]

I got a halfmoon male betta fish a few months ago. He is in a two gallon tank, water exchanges happen 30% every week, I use water conditioner and keep a somewhat regular feeding schedule and he also ...
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29 views

Help with Fin Damage on my Betta

So in the past my betta's fin got snagged on a plant I learned should not have been in his tank at all.. This is my first fish and didn't realize that the only fake plats in the tank should be silk. ...

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