Top 7 Aquarium Fish You’ll Regret Buying |Avoid These Mistakes!
🚫 Thinking of adding new fish to your aquarium? STOP!
Before you make a costly mistake, watch this video to discover the Top 7 Aquarium Fish You’ll Regret Buying. From aggressive behavior to high maintenance needs, these fish may seem appealing—but they’re more trouble than they’re worth!
✅ We’ll cover:
The hidden challenges of popular species
Compatibility issues with other fish
Tank size requirements you didn’t expect
Expert tips on better alternatives
🐠 Don’t let your dream aquarium turn into a nightmare. Learn from common mistakes and keep your tank stress-free and healthy!
🎯 Perfect for beginners and even experienced hobbyists looking to avoid bad choices.
🔍 This video is for you if you’re:
• New to aquariums and planning your first fish tank
• Wondering why some “popular” fish cause chaos
• Tired of bad advice from pet stores
• Looking to avoid aggressive or oversized fish
• Curious about the truth behind “starter fish” like goldfish or tiger barbs
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#aquariumfish #fishkeeping #freshwateraquarium #freshwaterfish
30 Comments
Oscars are the best! They are not aggressive at all! They will eat anything that fits in their mouths, but can live with any type of fish that are too big to fit their mouths! I have had them with Angels and goldfish and no aggression! Just make sure that the other fish are bigger or same size as the Oscars! . When Oscars grow they will not eat their smaller tank mates if they grew up together! 30 gallons / 120 litres is okay for 2 Oscar fish.
Bruh one of my first fish are flower horns he ate one of my angelfish😭😭😭
All of the above except flowerhorn & Discus.
Don’t buy koi fish because they are huge in size and they live in ponds
Cool video. Turn down the bg music though.
I have a male 3spot blue gourami named (KINGBLUE🔵👑) witb 2 females a 3spot blue named (tigressblue💙) afemale opaline gourami named (skyyblue💙) 1 bla ckskirt tetra cause my single male festivum cichlid named professor {hector eddgors} kill the others. hes jealous of my make 3spot blue gourami
My 2 goldfish and 2 blackish lived 20yrs
something not normal with my oscar as big as 30cm. He has not having all the behaviors listed maybe is my luck. he is now living with fishes smaller than him for over a year now in a 200 gallons aquarium
Jeez the music is far too loud
Gold fish also doesn't allow you to have a planted tank 😢
Haha i had a goldfish that grew a foot long his name was goldie i had to release him in a pond.
I’ve got two, ten years old Chinese Algie eater in my community tank and had no problems with the . They are about 5 inches long, convict’s cichlid however can become a problem when they start breeding, two females in a community tank with care can be fine, ❤
Others to add to this list:
[1] ANY large Central American Cichlid. As in Midas Cichlid, Jaguar Cichlid and various other Guapotes, Umbees and ALL Nandopsis species. Big? Some reach 2 feet. Aggressive? They range in temperament from "Rottweiler catching a burglar" to "Velociraptor on angel dust". These are for the dedicated Cichlid specialist with HUGE tanks. Try 250 gallons and up to do them justice.
[2] Red Tailed Catfish. Oh boy. You see the cute little 2 inch specimen in the shop? 6 months later it's 2 FEET long, and still growing. They're a food fish for indigenous Amazon peoples, that's how big they grow. A large one can reach FIVE FEET. Avoid.
[3] Pacus. Again, AVOID. A discus shaped fish that hits 4 feet, and needs to be kept in a shoal? Do you have a 1,000 gallon tank? No? Stay away.
[4] Electric Eel. Yes, amazingly, you CAN buy one of these from an aquarium dealer. Two reasons not to buy one are – one, it grows to 7 feet, and two, adults can deliver a 900 volt shock. That's enough to kill a 2,000 pound water buffalo.
[5] Piranhas. You shouldn't need to leave this off your list, but just in case … Red Bellied Piranhas reach 12 inches. They're best kept in a shoal, so you're looking at a large tank. When they ARE kept in a shoal, their bravery increases. If they decide to, they can take your hand off with those razor sharp teeth if you're not careful during aquarium maintenance.
[6] Black Shark. The king size cousin of the more familiar Red Tailed Shark. 2 feet in length when fully grown, and needs a 250 gallon tank.
And finally, just in case you EVER see one of these being offered for sale, which you shouldn't, but there's no telling in some places …
[7] Arapaima. The Arowana's king size cousin. Where I live in the UK, there's a public aquarium, which had one in a display aquarium some time ago. The display aquarium was large enough to sail a dinghy on the surface, and the decor consisted of whole felled trees. Reason? The fish was NINE FEET LONG and STILL GROWING. Leave this in the wild, or to public aquaria with COLOSSAL tanks.
I keep oscars and I wouldnt even recommend a 75 gallon tank maybe 100 gallons
The music volume is not enough. Make it louder 😒
I have quite a few fish, including, pleccos, guppies, goldfish, neon Tetris and a Siamese fighting fish, but the fish I regretted buying the most, was a cute looking silver cichlid
I have a question. If I buy too many fish will the die
Flowerhorn is big regret
I got a pleco 😊
I had a female Chinese Algae Eater. She wasn’t very territorial but she did not want the mini Catfish near her.
Orange Cup passed away in 2023.
I got her in 2017.
Why imprison fish in your aquarium ??
I will never regret from buying a fish. I have two goldfish. Do you know what is the number two and I will never regret buying any any fish.
I do have to agree with the Chinese algae eaters because I never had the best of luck with them and I did not know when I got them years ago that they did become aggressive to my other fish in the tank and these guys had a horrible habit of dying on me and they're very sensitive to water changes and they would jump out of the freaking tank they always found a way to jump out of the tank the same issue I had with bala sharks they would end up dying on me they would go crazy and they would jump out of the tank even with a lid on it I don't know how but they always found a way out 1052 fish anymore
Goldfish I used to have an abundance of goldfish didn't have the greatest luck keeping the fancy ones alive especially the Black Moors which I think are very beautiful but I did get goldfish to live up to 10 years the truth is they ended up developing cancer on their face and they were incredibly messy and they were very hard to keep clean the water was off in murky it was not fun I no longer have goldfish
Goldfish true are very nasty fish. All they do is eat and shit.
I had 3 koi fishes
size : 14 inches But sadly 2 of them died , now my tank only has
1 koi fish of 14 inches , now I'm thinking of buying new fish .
Now my question is it safe to add new fish with the 14 inche koi fish ?
Will the koi fish eat up the small fishes?
Now you are telling don't buy fishes and aquarium 😂😂
Hey, I've recently bought a blue acara fish, they are very beautiful ❤❤❤❤
I’ve had every fish on there. The goldfish is the easiest one. I don’t think people should buy fish thinking they’re going to die in a couple of years. You don’t buy a dog thinking it’s going to die in a couple of years. It could outlive you. So I don’t care if the fish will get a foot-long and lives 10 years. People should do the research, but don’t tell them not to buy them just because they live a long time.
I have a Oscar fish and we named him.Lava stripe because he had stripes that look like lava.He's going to get really big soon.But not for now.