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Fish & Aquatics

Aquarium setup, water care and fish health.

${"en": "Vibrant red betta fish swimming in a planted aquarium tank with blue water and decorations", "es": "Pez betta rojo vibrante nadando en un acuario plantado con agua azul y decoraciones", "fr": "Poisson betta rouge vibrant nageant dans un aquarium plant\u00e9 avec eau bleue et d\u00e9cors", "de": "Leuchtend roter Kampffisch schwimmt in einem bepflanzten Aquarium mit blauem Wasser", "nl": "Levendig rode bettavisse zwemmend in een beplant aquarium met blauw water en decoraties", "pt": "Peixe betta vermelho vibrante nadando em aqu\u00e1rio plantado com \u00e1gua azul e decora\u00e7\u00f5es", "it": "Pesce betta rosso vibrante che nuota in un acquario piantumato con acqua blu e decorazioni"}$

Fish & Aquatics

Betta Fish Tank Setup Guide

Betta splendens, commonly known as the Siamese fighting fish, is one of the most recognisable aquarium fish in Europe. Their vivid colours and dramatic…

Julia WrenfieldJuly 2, 2026

${"en": "Beginner aquarium with lush green live plants and colorful fish swimming among healthy vegetation", "es": "Acuario para principiantes con plantas vivas verdes exuberantes y peces coloridos nadando entre la vegetaci\u00f3n", "fr": "Aquarium pour d\u00e9butants avec des plantes vertes luxuriantes et des poissons color\u00e9s nageant parmi la v\u00e9g\u00e9tation", "de": "Anf\u00e4nger-Aquarium mit \u00fcppigen gr\u00fcnen Wasserpflanzen und farbigen Fischen, die zwischen der Vegetation schwimmen", "nl": "Beginners aquarium met weelderige groene waterplanten en gekleurde vissen zwemmend tussen de begroeiing", "pt": "Aqu\u00e1rio para iniciantes com plantas vivas verdes exuberantes e peixes coloridos nadando entre a vegeta\u00e7\u00e3o", "it": "Acquario per principianti con rigogliose piante vive verdi e pesci colorati che nuotano tra la vegetazione"}$

Fish & Aquatics

Aquarium Plants for Beginners: The 10 Most Forgiving Species

The aquarium hobby went through decades where plastic plants were the norm. Today, the evidence is clear: live plants provide benefits that no…

Julia WrenfieldJuly 2, 2026

${"en": "Tropical fish displaying signs of velvet disease and columnaris infection with visible lesions and discoloration in aquarium", "es": "Pez tropical mostrando s\u00edntomas de enfermedad terciopelada y columnaris con lesiones visibles en el acuario", "fr": "Poisson tropical pr\u00e9sentant des signes de maladie du velours et columnaris avec l\u00e9sions visibles en aquarium", "de": "Tropischer Fisch mit Anzeichen von Samtkrankheit und Columnaris-Infektion mit sichtbaren L\u00e4sionen im Aquarium", "nl": "Tropische vis met tekenen van fluweelziekte en columnaris-infectie met zichtbare laesies in het aquarium", "pt": "Peixe tropical exibindo sinais de doen\u00e7a do veludo e columnaris com les\u00f5es vis\u00edveis no aqu\u00e1rio", "it": "Pesce tropicale che mostra segni di malattia del velluto e columnaris con lesioni visibili in acquario"}$

Fish & Aquatics

Tropical Fish Diseases Velvet Columnaris Hole In The Head

Tropical fishkeeping is rewarding, colourful, and deeply absorbing — until your tank begins to look like a medical emergency. Three diseases, in…

Julia WrenfieldJuly 2, 2026

${"en": "Variety of colorful fish species swimming together in aquarium, representing different fish lifespans", "es": "Variedad de peces de colores nadando juntos en acuario, representando diferentes esperanzas de vida", "fr": "Vari\u00e9t\u00e9 de poissons color\u00e9s nageant ensemble dans un aquarium, repr\u00e9sentant diff\u00e9rentes dur\u00e9es de vie", "de": "Verschiedene farbige Fischarten schwimmen zusammen im Aquarium und zeigen unterschiedliche Lebenserwartungen", "nl": "Verscheidenheid van kleurrijke vissoorten zwemmend samen in aquarium, verschillende levensduren voorstellend", "pt": "Variedade de peixes coloridos nadando juntos em aqu\u00e1rio, representando diferentes expectativas de vida", "it": "Variet\u00e0 di pesci colorati che nuotano insieme in acquario, rappresentando diversi tempi di vita"}$

Fish & Aquatics

How Long Do Fish Live? Lifespan Guide by Species

Fish lifespans range from under 1 year (tiny killifish species that complete their entire life cycle during a single rainy season) to over a century…

Julia WrenfieldJuly 2, 2026

${"en": "Colorful betta fish swimming in aquarium tank with plants and clean water", "es": "Pez betta colorido nadando en acuario con plantas y agua limpia", "fr": "Poisson betta color\u00e9 nageant dans un aquarium avec plantes et eau propre", "de": "Bunter Kampffisch schwimmt in Aquarium mit Pflanzen und sauberem Wasser", "nl": "Kleurrijke siamese kempvis zwemmend in aquarium met planten en schoon water", "pt": "Peixe betta colorido nadando em aqu\u00e1rio com plantas e \u00e1gua limpa", "it": "Pesce betta colorato che nuota in acquario con piante e acqua pulita"}$

Fish & Aquatics

Betta Fish Diseases: Identification, Treatment & Prevention Guide

Betta fish are sold as low-maintenance pets, but that reputation has caused enormous suffering. Kept in cycled tanks with clean water and appropriate…

Julia WrenfieldJuly 2, 2026

${"en": "Colorful koi fish swimming in a well-maintained outdoor pond with clear water and aquatic plants", "es": "Peces koi coloridos nadando en un estanque exterior bien mantenido con agua clara y plantas acu\u00e1ticas", "fr": "Poissons koi color\u00e9s nageant dans un bassin ext\u00e9rieur bien entretenu avec eau claire et plantes aquatiques", "de": "Bunte Koifische schwimmen in einem gepflegten Au\u00dfenteich mit klarem Wasser und Wasserpflanzen", "nl": "Kleurrijke koivissen zwemmend in een goed onderhouden buitenvijver met helder water en waterplanten", "pt": "Peixes koi coloridos nadando em um lago ao ar livre bem mantido com \u00e1gua clara e plantas aqu\u00e1ticas", "it": "Pesci koi colorati che nuotano in uno stagno esterno ben mantenuto con acqua limpida e piante acquatiche"}$

Fish & Aquatics

Koi Pond Guide Europe

Koi (Cyprinus rubrofuscus) are among the most rewarding pond fish a keeper can work with, but they are also among the most demanding. Large,…

Julia WrenfieldJuly 2, 2026

${"en": "Vibrant red betta fish in aquarium tank with feeding pellets and aquatic plants", "es": "Pez betta rojo vibrante en acuario con pellets de alimento y plantas acu\u00e1ticas", "fr": "Poisson betta rouge vif dans un aquarium avec granul\u00e9s d'alimentation et plantes aquatiques", "de": "Leuchtend roter Kampffisch im Aquarium mit Futterpellets und Wasserpflanzen", "nl": "Felrode bettavis in aquarium met voerpellets en waterplanten", "pt": "Peixe betta vermelho vibrante em aqu\u00e1rio com pellets de ra\u00e7\u00e3o e plantas aqu\u00e1ticas", "it": "Pesce betta rosso brillante in acquario con pellet di mangime e piante acquatiche"}$

Fish & Aquatics

Betta Fish Feeding: What They Really Need to Thrive

In the wild, Betta splendens inhabits shallow rice paddies and slow-moving streams across Thailand and Cambodia, where it hunts insect larvae, mosquito…

Julia WrenfieldJuly 2, 2026

${"en": "Lush green aquatic plants growing in a beginner-friendly planted aquarium with fish swimming among the vegetation", "es": "Plantas acu\u00e1ticas verdes exuberantes creciendo en un acuario plantado para principiantes con peces nadando entre la vegetaci\u00f3n", "fr": "Plantes aquatiques vertes luxuriantes poussant dans un aquarium plant\u00e9 adapt\u00e9 aux d\u00e9butants avec des poissons nageant parmi la v\u00e9g\u00e9tation", "de": "\u00dcppig gr\u00fcne Wasserpflanzen wachsen in einem anf\u00e4ngerfreundlichen bepflanzten Aquarium mit Fischen, die zwischen der Vegetation schwimmen", "nl": "Weelderig groene waterplanten groeien in een beginnersaquarium met beplanting en vissen die tussen de begroeiing zwemmen", "pt": "Plantas aqu\u00e1ticas verdes exuberantes crescendo em um aqu\u00e1rio plantado amig\u00e1vel para iniciantes com peixes nadando entre a vegeta\u00e7\u00e3o", "it": "Piante acquatiche verdi lussureggianti che crescono in un acquario piantumato adatto ai principianti con pesci che nuotano tra la vegetazione"}$

Fish & Aquatics

Aquarium Plants Beginners

If you have ever compared a planted aquarium to a bare one, the difference is striking — and it goes far beyond aesthetics. Live aquatic plants offer a…

Julia WrenfieldJuly 2, 2026

${"en": "Colorful male and female guppies swimming in aquarium with aquatic plants and gravel substrate", "es": "Guppies macho y hembra coloridos nadando en acuario con plantas acu\u00e1ticas y sustrato de grava", "fr": "Guppies m\u00e2les et femelles color\u00e9s nageant dans un aquarium avec plantes aquatiques et substrat", "de": "Bunte m\u00e4nnliche und weibliche Guppys schwimmen im Aquarium mit Wasserpflanzen und Kiesgrund", "nl": "Kleurrijke mannelijke en vrouwelijke guppies zwemmend in aquarium met waterplanten en grind", "pt": "Guppies macho e f\u00eamea coloridos nadando em aqu\u00e1rio com plantas aqu\u00e1ticas e substrato de cascalho", "it": "Guppy maschi e femmine colorati che nuotano in acquario con piante acquatiche e substrato di ghiaia"}$

Fish & Aquatics

Guppy Care Guide: Breeding, Feeding & Common Diseases

The minimum recommended tank size for a small group of guppies is 40 litres, though 60–80 litres gives far more water stability and room to manage the…

Julia WrenfieldJuly 2, 2026

${"en": "Vibrant red betta fish swimming in aquarium tank with aquatic plants and blue water", "es": "Pez betta rojo vibrante nadando en acuario con plantas acu\u00e1ticas y agua azul", "fr": "Poisson betta rouge vibrant nageant dans un aquarium avec plantes aquatiques", "de": "Leuchtend roter Kampffisch schwimmt im Aquarium mit Wasserpflanzen", "nl": "Felrode bettavissen zwemmend in aquarium met waterplanten en blauw water", "pt": "Peixe betta vermelho vibrante nadando em aqu\u00e1rio com plantas aqu\u00e1ticas", "it": "Pesce betta rosso vivido che nuota in acquario con piante acquatiche"}$

Fish & Aquatics

Betta Fish Care Guide: Tank Size, Water & Common Mistakes

Betta splendens — the Siamese fighting fish — is one of the most popular aquarium fish in the world, and one of the most misunderstood. They're…

Julia WrenfieldJuly 2, 2026

${"en": "Colorful beginner-friendly tropical fish swimming in a planted aquarium with blue water and natural lighting", "es": "Peces tropicales coloridos aptos para principiantes nadando en un acuario plantado con agua azul", "fr": "Poissons tropicaux color\u00e9s adapt\u00e9s aux d\u00e9butants nageant dans un aquarium plant\u00e9 avec \u00e9clairage naturel", "de": "Bunte anf\u00e4ngerfreundliche Tropenfische schwimmen in einem bepflanzten Aquarium mit blauem Wasser", "nl": "Gekleurde tropische vissen voor beginners zwemmend in een beplant aquarium met blauw water", "pt": "Peixes tropicais coloridos adequados para iniciantes nadando em aqu\u00e1rio plantado com \u00e1gua azul", "it": "Pesci tropicali colorati adatti ai principianti che nuotano in un acquario piantumato con acqua blu"}$

Fish & Aquatics

Tropical Fish for Beginners: 10 Hardy Species & Tank Setup

Tropical fish are one of the most rewarding pets you can keep, but the hobby has a steep learning curve when you start with the wrong species or skip…

Julia WrenfieldJuly 2, 2026

${"en": "Goldfish displaying signs of illness including white spots and torn fins in aquarium water", "es": "Pez dorado enfermo mostrando manchas blancas y aletas da\u00f1adas en agua de acuario", "fr": "Poisson rouge malade pr\u00e9sentant des points blancs et des nageoires endommag\u00e9es", "de": "Kranker Goldfisch mit wei\u00dfen Flecken und besch\u00e4digten Flossen im Aquarienwasser", "nl": "Zieke goudvis met witte vlekken en beschadigde vinnen in aquariumwater", "pt": "Peixe dourado doente mostrando manchas brancas e nadadeiras danificadas na \u00e1gua", "it": "Pesce rosso malato con macchie bianche e pinne danneggiate in acqua d'acquario"}$

Fish & Aquatics

Common Goldfish Diseases Ich Fin Rot Dropsy Swim Bladder

Goldfish are often considered beginner fish, yet they are remarkably susceptible to disease when kept in poor conditions. A goldfish can live for 15 to…

Julia WrenfieldJuly 2, 2026

${"en": "Sick fish swimming near aquarium plants, displaying signs of disease like fin damage and discoloration", "es": "Pez enfermo nadando cerca de plantas de acuario, mostrando signos de enfermedad como da\u00f1o de aletas", "fr": "Poisson malade nageant pr\u00e8s des plantes de l'aquarium, montrant des signes de maladie", "de": "Kranker Fisch schwimmt neben Aquariumpflanzen und zeigt Krankheitszeichen wie Flossenschaden", "nl": "Zieke vis zwemmend bij aquariomplanten met zichtbare ziekteverschijnselen en vinbeschadiging", "pt": "Peixe doente nadando perto de plantas do aqu\u00e1rio exibindo sinais de doen\u00e7a e danos nas nadadeiras", "it": "Pesce malato che nuota vicino alle piante dell'acquario con segni visibili di malattia e danno delle pinne"}$

Fish & Aquatics

Fish Tank Common Diseases

Fish are masters of concealment when it comes to illness. In the wild, showing weakness attracts predators, so fish have evolved to mask symptoms until…

Julia WrenfieldJuly 2, 2026

${"en": "Koi fish displaying ulcers and lesions on body surface, symptoms of herpesvirus and spring viraemia disease", "es": "Pez koi con \u00falceras y lesiones en la superficie corporal, s\u00edntomas del herpesvirus y viremia de primavera", "fr": "Carpe koi pr\u00e9sentant des ulc\u00e8res et l\u00e9sions sur la surface du corps, sympt\u00f4mes d'herp\u00e8svirus et de vir\u00e9mie printani\u00e8re", "de": "Koi-Fisch mit Geschw\u00fcren und L\u00e4sionen auf der K\u00f6rperoberfl\u00e4che, Symptome von Herpesvirus und Fr\u00fchjahrsvirmie", "nl": "Koi-vis met zweren en laesies op het lichaamsoppervlak, symptomen van herpesvirus en lenteviraemie", "pt": "Peixe koi exibindo \u00falceras e les\u00f5es na superf\u00edcie corporal, sintomas de herpesv\u00edrus e viremina primaveril", "it": "Pesce koi con ulcere e lesioni sulla superficie corporea, sintomi di herpesvirus e viremia primaverile"}$

Fish & Aquatics

Koi Health Problems Herpesvirus Ulcer Disease Spring Viraemia

Koi are among the most valuable ornamental fish in the world, with prized specimens selling for tens of thousands of pounds. Yet even a modest garden…

Julia WrenfieldJuly 2, 2026

${"en": "Fish swimming in a new aquarium tank during nitrogen cycle establishment with visible water clarity", "es": "Peces nadando en un acuario nuevo durante el establecimiento del ciclo del nitr\u00f3geno", "fr": "Poissons nageant dans un aquarium neuf pendant l'\u00e9tablissement du cycle de l'azote", "de": "Fische schwimmen in einem neuen Aquarium w\u00e4hrend der Stickstoffkreislauf-Etablierung", "nl": "Vissen zwemmen in een nieuw aquarium tijdens de vorming van de stikstofcyclus", "pt": "Peixes nadando em um aqu\u00e1rio novo durante o estabelecimento do ciclo do nitrog\u00eanio", "it": "Pesci che nuotano in un acquario nuovo durante l'instaurazione del ciclo dell'azoto"}$

Fish & Aquatics

The Nitrogen Cycle: Why New Fish Tanks Kill Fish

The nitrogen cycle is a biological process driven by colonies of beneficial bacteria that convert toxic fish waste into progressively less harmful…

Julia WrenfieldJuly 2, 2026

${"en": "Goldfish swimming in small fishbowl with inadequate space and care conditions", "es": "Pez dorado nadando en pecera peque\u00f1a con espacio e condiciones de cuidado insuficientes", "fr": "Poisson rouge nageant dans un petit bocal avec espace et conditions de soins inad\u00e9quats", "de": "Goldfisch schwimmt in kleinem Aquarium mit unzureichendem Platz und schlechten Bedingungen", "nl": "Goudvis zwemmend in kleine vissenkom met onvoldoende ruimte en verzorgingsomstandigheden", "pt": "Peixe dourado nadando em pequeno aqu\u00e1rio com espa\u00e7o e condi\u00e7\u00f5es de cuidado inadequados", "it": "Pesce rosso che nuota in piccolo acquario con spazio e condizioni di cura insufficienti"}$

Fish & Aquatics

Goldfish Care: The Common Mistakes That Kill Them Early

Goldfish are the world's most popular pet fish, and also among the most mistreated — not out of cruelty, but because decades of bad advice have become…

Julia WrenfieldJuly 2, 2026

${"en": "Aquarium with fish and aquatic plants, showing water testing kit and pH meter for monitoring water parameters", "es": "Acuario con peces y plantas acu\u00e1ticas, mostrando kit de prueba de agua y medidor de pH para monitorear par\u00e1metros", "fr": "Aquarium avec poissons et plantes aquatiques, montrant kit de test d'eau et pH-m\u00e8tre pour surveiller les param\u00e8tres", "de": "Aquarium mit Fischen und Wasserpflanzen, zeigt Wassertestkit und pH-Messer zur \u00dcberwachung von Wasserparametern", "nl": "Aquarium met vissen en waterplanten, met watertestkit en pH-meter voor controle van waterparameters", "pt": "Aqu\u00e1rio com peixes e plantas aqu\u00e1ticas, mostrando kit de teste de \u00e1gua e medidor de pH para monitorar par\u00e2metros", "it": "Acquario con pesci e piante acquatiche, che mostra kit di test dell'acqua e pH-metro per monitorare i parametri"}$

Fish & Aquatics

Aquarium Water Parameters: pH, Ammonia, Nitrite & Temperature Guide

In the terrestrial animal world, we monitor food quality, environment, and health symptoms. In the aquatic world, water quality is all of those things…

Julia WrenfieldJuly 2, 2026

${"en": "Sick fish floating at water surface showing signs of swim bladder disease and buoyancy problems", "es": "Pez enfermo flotando en la superficie del agua mostrando signos de enfermedad de la vejiga natatoria", "fr": "Poisson malade flottant \u00e0 la surface de l'eau pr\u00e9sentant des signes de maladie de la vessie natatoire", "de": "Kranker Fisch an der Wasseroberfl\u00e4che mit Symptomen einer Schwimmblasenkrankheit", "nl": "Zieke vis drijvend aan het wateroppervlak met tekenen van zwemblaasziekte", "pt": "Peixe doente flutuando na superf\u00edcie da \u00e1gua com sinais de doen\u00e7a da bexiga natat\u00f3ria", "it": "Pesce malato che galleggia in superficie con segni di malattia della vescica natatoria"}$

Fish & Aquatics

Fish Swim Bladder Disease: Causes, Treatment & the Fasting Method

The swim bladder — also called the gas bladder or air bladder — is an internal gas-filled organ that functions as a buoyancy control device, allowing…

Julia WrenfieldJuly 2, 2026

Fish & Aquatics

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