Questions tagged [fish]

Fish kept as pets in a natural or artificial enclosure.

76 questions with no upvoted or accepted answers
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5 votes
0 answers
85 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 ...
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4 votes
0 answers
150 views

Suddenly lethargic Antenna/ Suckermouth catfish

I've got a 31,7 gallon tank in which about 35 fishes live. For cleaner fishes it is: 2 Antenna catfish (black and brown) and since almost 4 weeks now also 5 armored catfish (others are all non ...
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4 votes
0 answers
463 views

What causes a Norman's lampeye to lose the ability to move it's tail fin?

I have an aquarium with eight Norman's lampeyes (unfortunately 5 male, 3 female) and some other fish. Last Sunday I discovered that one of the Norman's lampeyes wasn't doing so well. She was nearly ...
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4 votes
0 answers
133 views

What should the ideal salt content of a brine shrimp grow-out tank be?

I am raising brine shrimp in a grow out tank and I normally use 1.018 specific gravity of salt in the hatchery. I have read online that the the ideal specific gravity can range from 1.018 to 1.045. ...
3 votes
0 answers
91 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 ...
3 votes
0 answers
65 views

How can I tell if my goldfishes' popeye is due to stunting or an infection?

I have three goldfish in a twenty-gallon tank. I know it's not the best set up and I would like to move them to a bigger tank when I get the opportunity, but they seem happy and healthy enough. I have ...
3 votes
0 answers
52 views

Is it safe to catch and move hibernating fish?

I have about 50 mixed types of goldfish and koi in an outdoor pond. I want to remodel the pond, expanding it to double the volume of water. I will relocate them temporarily to a 2000 gallon (7600 ...
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3 votes
0 answers
50 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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3 votes
0 answers
102 views

My aggressive fish has become very shy, afraid in the last week. What changed?

I have a 225 gallon aquarium. I have 10 large fish inside. The most aggressive fish is my Red Devil. He normally chases all other fish and the others will rarely if ever attempt to go after him. This ...
3 votes
0 answers
349 views

Koi fish sick and lethargic

I have a very large (8 feet by 12 feet by 6 feet deep) koi fish pond with a waterfall and extensive filtration system I inherited with the house. In it is a very large and older koi (18 inches long ...
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3 votes
1 answer
2k views

Can fish live in a plant-filled pond without being fed?

I have small fish (I don't know what kind they are) in a 500 gallon pond (around 2000 liters) that are very hardy. They survived their previous home (hundreds of fish in a 70 gallon / around 270 ...
  • 31
3 votes
1 answer
1k views

My male platy is clamping, is he sick?

I got this platy when I first got my tank. He used to swim around a lot, at the top, in the middle, and low close to the substrate, fins open, chasing the two female platies. He still feeds and if I ...
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2 votes
1 answer
102 views

Does an underground tank need a heater?

I have dug out a 3ftx3ftx44ft (d/w/h) (0.9mx0.9mx13m) area for raising tilapia, and I will be adding a layer of 6mm plastic to hold the water. I want to know whether I will need to buy a heater for ...
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2 votes
1 answer
99 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?
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2 votes
0 answers
160 views

catfish has swollen belly

I have some catfish, I noticed a few a them have swollen bellies, maybe 10 in 1000 have these swollen and reddish bellies, not sure if it's something to be worried about. also they are like this ...
  • 121
2 votes
0 answers
49 views

How can I prevent my plants from getting eaten too fast?

I've got a huge problem with my fish and plants. They eat them too rapidly. Put in 5 plants yesterday afternoon. Today they are half eaten already. Mostly, the sword bearers are responsible. Eaters ...
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2 votes
0 answers
45 views

Color change in guppy

My guppy looked pretty healthy and shiny just three days ago: And yesterday... it just darkened. The scale pattern just got so dark all of a sudden. Should I be worried? And this is today:
2 votes
0 answers
43 views

Black molly male attacking female

We have 3 female black mollies. 2 black ones which have turned a bit silvery/whiteish. Originally, we had one male which had the same colour, but we noticed it will be dying soon (swimming upside ...
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2 votes
0 answers
31 views

How to encourage an aquarium plant to carpet on it's own?

I have a small 10 gallon planted aquarium with Staurogyne repens as the main plant. My long-term goal is to have the S. repens cover most of the substrate. The substrate in my aquarium is organic soil ...
  • 636
2 votes
0 answers
199 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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2 votes
0 answers
37 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 ...
2 votes
0 answers
26 views

Keeping fry out of canister filter?

I have a ~1000 gallon pond in my yard. It contains mosquitofish and goldfish. The pond currently has 2 of these submersible filters similar to this: However, to clean the filter, I need to wade into ...
2 votes
0 answers
136 views

Pregnant platy behavior

I have an orange platy and I suspect she is pregnant and switched her from the main 60 gallon to an old 20 gallon tank, but would eat until I put the the male platy with her. Is this normal? I wonder ...
2 votes
0 answers
50 views

Should I euthanize my fish?

For almost a year, my pet cichlid has been favoring laying on his right side at the bottom of the tank, but still swims around (clumsily) and eats. I do monthly water changes, I've used Pimafix and ...
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2 votes
0 answers
45 views

Is my betta fish aging or is he sick?

My betta fish, named Lushi, has been progressively getting worse for the past few months. I bought him in September, 2019 (9 months ago) from Petco -- although he seemed fully grown when I bought him, ...
2 votes
0 answers
37 views

Is my Betta too thin or sick?

I recently became a responsible betta owner. I never knew how wrong I was about them. My butterfly betta, Olaf eats very well but has a lump on one side and is less active today. He usually swims very ...
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2 votes
0 answers
76 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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2 votes
0 answers
960 views

My koi fishes are dying every day

It all started last week. My big koi started to spin out of control and died the same day. I went to the pond place and they gave me a parasite treatment bottle, with instructions to use it for 3 days....
2 votes
0 answers
261 views

Half-Moon Betta fish tail-fin is curled in on itself, what could be the issue?

After having my beta for two weeks I noticed that his tail was curled in on itself, and when I had to net him to move him i noticed it got worse. He seems to swim fine but its just constantly curled ...
2 votes
0 answers
163 views

Freshwater aquarium - many fish batches dead, LFS keeps claiming that water is 'perfect'

Got a new 30 gallon aquarium ~1 month ago. The seller told me to use tap water (no conditiner), run the pump for a week (to get rid of chlorine), then bring a sample for test. Did that, didn't use ...
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2 votes
0 answers
49 views

Starting up a canister filter that has been off for a while

We prepared an Eheim canister about a week ago and had also put some tank water in it but, because of a series of setbacks, we haven't been able to start the filter in our new tank. We are still not ...
  • 163
2 votes
0 answers
1k views

Why do fluidized sand filters need a prefilter?

When talking fresh water fish tanks, why do people recommend that fluidized sand filters have a prefilter like a sponge? Assume there is a separate system for removing solid waste from the tank, like ...
2 votes
0 answers
54 views

How do I know how old my betta is?

I recently adopted 2 beautiful female Betta fish! I also have one male. I noticed that the girls are a lot more active than the male. As they swim around in their tanks, Mr.Rainbow whom I have had in ...
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2 votes
0 answers
79 views

Can't find fish disease, Fish body Poped Up

It's sometime since my fish body poped up with color of white, and then it's tail some how more blody, i asked someone and send picture he didn't reply, so i went to store yesterday, and he replied to ...
2 votes
0 answers
71 views

Best environment and Matches, beside Beta, Snail, and small Plecos

I own a very small tank, which I'll replace soon, with I think a 40G tank. I had a betta, and yesterday i bought several fish, of which only the placus, 5 tiny fish, and two snails survived the war, ...
2 votes
0 answers
89 views

Is it possible to use aquarium salt instead of marine salt to raise brine shrimp to adulthood?

In order to raise brine shrimp to adulthood, I have heard that it is better to use marine salt instead of aquarium salt in the grow-out tank. Aquarium salt (sodium chloride or NaCl) is widely used to ...
1 vote
0 answers
34 views

Why do a dog's anal glands smell like fish?

What is the correlation between the two scents, chemically and otherwise?
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1 vote
0 answers
31 views

Betta fish ignores bloodworms as food

I recently purchased bloodworms as a supplemental food for my Betta fish, which are often represented as a "treat" for them. However, even though my Betta fish swims to the front of the tank ...
1 vote
0 answers
149 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) ...
  • 111
1 vote
0 answers
349 views

Clear bubble forming on guppy fin

My male white guppy has a strange, bubble-filled pocket on both sides of his dorsal fin. It does not seem to be affecting or causing any pain to the guppy. He is acting normal. He is still energetic ...
1 vote
0 answers
74 views

Hydra infestation

Recently I’ve noticed a hydra infestation. I’ve pulled out about 5 hydras already, but I know there are some left. One of my golden back shrimp have already lost their life to the hydra’s paralysing, ...
1 vote
1 answer
476 views

Why my goldfish red cap lost its head color?

Is it normal that the color fading away..? The water seems fine. Food : Tetra Goldfish Growth and other pellet. It's been 2 months with me.
1 vote
0 answers
21 views

Mollys appear bloated after eating bloodworm

We have a 60 litre tank with around 6 adult fish, and 6-8 juveniles. They are mostly happy, rarely swim at the surface, and spend much of their time foraging. On the rare (maybe monthly) occasions I ...
1 vote
0 answers
61 views

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 ...
1 vote
0 answers
100 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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1 vote
0 answers
47 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 ...
1 vote
0 answers
29 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?
1 vote
0 answers
59 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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1 vote
0 answers
35 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 ...
  • 11
1 vote
0 answers
99 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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