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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15 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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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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1answer
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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
36 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
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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
35 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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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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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
114 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
36 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
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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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1answer
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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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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
58 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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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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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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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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1answer
51 views

Is my orange platy pregnant? [duplicate]

Hi does my orange platy look pregnant? It’s been that size for a little while now so I’m not sure.
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2answers
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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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0answers
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Black algae all over tank after 6 months [duplicate]

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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2answers
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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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1answer
68 views

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 injector Macro + Micro fertilizers 6h / day lightning I added some aquarium starter fluid Decent filter with a ...
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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
1k 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
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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
55 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
151 views

My goldfish is dying

I have had 2 goldfish for 2 years in my aquarium. This one was good last night. I don't know what happened today it is somehow floating on side with little movement, like sleeping. I put it outside of ...
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1answer
68 views

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
96 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
46 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
34 views

How to transfer established saltwater into a bigger tank?

I set up a 5.5 gallon (21 liters) tank and just purchased an 8 gallon (30 liters) tank. What's the easiest way to move the saltwater from the old tank into the new tank without ...
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1answer
83 views

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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0answers
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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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73 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
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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
155 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
59 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
42 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
52 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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52 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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2answers
44 views

Aeration of fish tank

Should I keep the air pump of my fish tank on all the time? What is the rate of oxygen absorption in water at 25 degrees Celsius? I have a primitive type of aeration system where a thin tube is ...
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1answer
49 views

Ichthyophthiriasis control in tanks, nitrites and nitrates

I have recently returned my fish to my main tank, a 65 g, after treating two weeks for ichthyophthiriasis. Two days after treatment ended, I transferred my larger fish home to a fully planted tank and ...
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24 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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Will ichthyophthiriasis 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 wasn't 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
207 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
83 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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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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