fish
Species whose documented pH range includes 7.0 — overlap check only; measure your tap and tank pH before stocking.
200 species
Corydoras adolfoi
Keep a group on clean fine sand or smooth, rounded gravel.
Corydoras adolfoi
Keep a group on clean fine sand or smooth, rounded gravel.
Apistogramma agassizii
Apistogramma agassizii
Betta splendens hybrid
Keep males separate, with steady heat, gentle flow, surface access and a cover.
Betta splendens hybrid
High aggression — research tankmates carefully
Keep males separate, with steady heat, gentle flow, surface access and a cover.
Botia almorhae
Botia almorhae
Caridina multidentata
Caridina multidentata
Osteoglossum bicirrhosum
Osteoglossum bicirrhosum
Pseudomystus siamensis
Pseudomystus siamensis
Hara jerdoni
Hara jerdoni
Channa stewartii
Channa stewartii
Atyopsis moluccensis
Atyopsis moluccensis
Epiplatys annulatus
Epiplatys annulatus
Nandopsis tetracanthus
Nandopsis tetracanthus
Potamotrygon henlei
Potamotrygon henlei
Apteronotus albifrons
Provide effective filtration, sheltered retreats and at least 450 L for one adult; allow more room for additional fish.
Apteronotus albifrons
Provide effective filtration, sheltered retreats and at least 450 L for one adult; allow more room for additional fish.
Hyphessobrycon herbertaxelrodi
Hyphessobrycon herbertaxelrodi
Hyphessobrycon megalopterus
Hyphessobrycon megalopterus
Pethia nigrofasciata
Pethia nigrofasciata
Gymnocorymbus ternetzi
Gymnocorymbus ternetzi
Thayeria boehlkei
Thayeria boehlkei
Rasbora borapetensis
Rasbora borapetensis
Hyphessobrycon erythrostigma
Hyphessobrycon erythrostigma
Andinoacara pulcher
Provide a base of at least 120 × 30 cm for a pair and feed varied, predominantly carnivorous foods.
Andinoacara pulcher
Provide a base of at least 120 × 30 cm for a pair and feed varied, predominantly carnivorous foods.
Stiphodon percnopterygionus
Stiphodon percnopterygionus
Brachydanio kerri
Brachydanio kerri
Fundulopanchax sjostedti
Fundulopanchax sjostedti
Fundulopanchax gardneri
Manage male aggression with cover and sex ratio; offer live or frozen food and fit a lid.
Fundulopanchax gardneri
Manage male aggression with cover and sex ratio; offer live or frozen food and fit a lid.
Panaque suttonorum
Provide wood alongside varied food, sheltered retreats and effective filtration.
Panaque suttonorum
Provide wood alongside varied food, sheltered retreats and effective filtration.
Channa bleheri
Channa bleheri
Melanotaenia boesemani
Melanotaenia boesemani
Mikrogeophagus altispinosus
Mikrogeophagus altispinosus
Pangio shelfordii
Pangio shelfordii
Osteogaster aenea
Keep a group with a base of at least 80 × 30 cm and clean sand or smooth gravel.
Osteogaster aenea
Keep a group with a base of at least 80 × 30 cm and clean sand or smooth gravel.
Hyphessobrycon anisitsi
Hyphessobrycon anisitsi
Ameca splendens
Ameca splendens
Paracheirodon axelrodi
Paracheirodon axelrodi
Marosatherina ladigesi
Marosatherina ladigesi
Badis badis
Badis badis
Oliotius oligolepis
Oliotius oligolepis
Pseudogastromyzon cheni
Maintain strong oxygenation, water movement and mature biofilm on rocks.
Pseudogastromyzon cheni
Maintain strong oxygenation, water movement and mature biofilm on rocks.
Puntius titteya
Puntius titteya
Neocaridina davidi
Neocaridina davidi
Dicrossus filamentosus
Dicrossus filamentosus
Boraras brigittae
Boraras brigittae
Gyrinocheilus aymonieri
Adults are territorial and may damage tankmates; a group of six is only an option in a very large tank.
Gyrinocheilus aymonieri
Fin nipper — avoid with long-finned tankmates
Adults are territorial and may damage tankmates; a group of six is only an option in a very large tank.
Barbodes semifasciolatus
Barbodes semifasciolatus
Rhodeus ocellatus
Provide a cool winter rest, planted cover and good oxygenation.
Rhodeus ocellatus
Chromobotia macracanthus
Plan for adult group space and hiding places; use a mature tank and a secure cover.
Chromobotia macracanthus
Plan for adult group space and hiding places; use a mature tank and a secure cover.
Rasbora kalochroma
Rasbora kalochroma
Stiphodon semoni
Stiphodon semoni
Apistogramma cacatuoides
Apistogramma cacatuoides
Hyphessobrycon columbianus
Hyphessobrycon columbianus
Channa pulchra
Channa pulchra
Otocinclus vittatus
Use a mature tank with established biofilm; confirm actual feeding and supplement food.
Otocinclus vittatus
Use a mature tank with established biofilm; confirm actual feeding and supplement food.
Phenacogrammus interruptus
Phenacogrammus interruptus
Amatitlania nigrofasciata
Amatitlania nigrofasciata
Betta imbellis
Betta imbellis
Oryzias woworae
Oryzias woworae
Satanoperca jurupari
Satanoperca jurupari
Sahyadria denisonii
Sahyadria denisonii
Chlamydogobius eremius
Chlamydogobius eremius
Moenkhausia pittieri
Moenkhausia pittieri
Danio nigrofasciatus
Danio nigrofasciatus
Trichogaster lalius
Trichogaster lalius
Melanotaenia praecox
Keep a group with open swimming space; maintain stable water and regular partial water changes.
Melanotaenia praecox
Keep a group with open swimming space; maintain stable water and regular partial water changes.
Mikrogeophagus ramirezi
Maintain stable warm water and provide cover, open sand and a base of at least 60 × 30 cm.
Mikrogeophagus ramirezi
Maintain stable warm water and provide cover, open sand and a base of at least 60 × 30 cm.
Gnathonemus petersii
Gnathonemus petersii
Hyphessobrycon amandae
Hyphessobrycon amandae
Danio erythromicron
Keep a group of twenty or more with dense cover and a base of at least 60 × 30 cm.
Danio erythromicron
Keep a group of twenty or more with dense cover and a base of at least 60 × 30 cm.
Poecilia wingei
Poecilia wingei
Tetraodon biocellatus
Tetraodon biocellatus
Datnioides microlepis
Datnioides microlepis
Mastacembelus erythrotaenia
Mastacembelus erythrotaenia
Thorichthys meeki
Thorichthys meeki
Desmopuntius pentazona
Desmopuntius pentazona
Epalzeorhynchos kalopterum
Epalzeorhynchos kalopterum
Fin nipper — avoid with long-finned tankmates
Pseudomugil furcatus
Pseudomugil furcatus
Pterophyllum scalare
Pterophyllum scalare
Pantodon buchholzi
Pantodon buchholzi
Betta splendens
Keep males separate; provide steady heat, gentle flow, surface access and a cover.
Betta splendens
High aggression — research tankmates carefully
Keep males separate; provide steady heat, gentle flow, surface access and a cover.
Danio margaritatus
Keep a group of twenty or more with dense cover and a base of at least 45 × 30 cm.
Danio margaritatus
Keep a group of twenty or more with dense cover and a base of at least 45 × 30 cm.
Palaemon paludosus
Palaemon paludosus
Devario malabaricus
Keep a large group with open swimming space and a secure lid; avoid timid or slow tankmates.
Devario malabaricus
Keep a large group with open swimming space and a secure lid; avoid timid or slow tankmates.
Pangio myersi
Pangio myersi
Sturisomatichthys aureus
Provide clean water, sheltered resting places and water circulation.
Sturisomatichthys aureus
Provide clean water, sheltered resting places and water circulation.
Prionobrama filigera
Prionobrama filigera
Kryptopterus vitreolus
Keep a group in a mature, stable tank with calm companions; offer small live or frozen foods daily.
Kryptopterus vitreolus
Keep a group in a mature, stable tank with calm companions; offer small live or frozen foods daily.
Tetraodon lineatus
Keep a single fish alone; provide hard-shelled foods and avoid handling near its teeth.
Tetraodon lineatus
High aggression — research tankmates carefully
Keep a single fish alone; provide hard-shelled foods and avoid handling near its teeth.
Danio choprae
Danio choprae
Hemigrammus erythrozonus
Hemigrammus erythrozonus
Baryancistrus xanthellus
Baryancistrus xanthellus
Brachydanio tinwini
Brachydanio tinwini
Heros efasciatus
Provide a base of at least 120 × 45 cm; allow more space for a pair or group.
Heros efasciatus
Provide a base of at least 120 × 45 cm; allow more space for a pair or group.
Channa aurantimaculata
Channa aurantimaculata
Polypterus senegalus
Provide a long, broad aquarium, unrestricted surface access and a secure lid; smaller fish may be eaten.
Polypterus senegalus
Provide a long, broad aquarium, unrestricted surface access and a secure lid; smaller fish may be eaten.
Xiphophorus hellerii
Xiphophorus hellerii
Andinoacara rivulatus
Andinoacara rivulatus
Biotodoma cupido
Biotodoma cupido
Cichlasoma festae
Cichlasoma festae
Bunocephalus coracoideus
Bunocephalus coracoideus
Poecilia reticulata
Poecilia reticulata
Nandopsis haitiensis
Provide ample space and strong filtration; breeding aggression can seriously injure tankmates.
Nandopsis haitiensis
Provide ample space and strong filtration; breeding aggression can seriously injure tankmates.
Trigonostigma heteromorpha
Trigonostigma heteromorpha
Hemigrammus ocellifer
Hemigrammus ocellifer
Gastromyzon punctulatus
Gastromyzon punctulatus
Pseudomugil mellis
Provide dense cover, stable warm water and room for fish to retreat from displaying males.
Pseudomugil mellis
Provide dense cover, stable warm water and room for fish to retreat from displaying males.
Trichogaster chuna
Trichogaster chuna
Megalechis thoracata
Megalechis thoracata
Opsariichthys bidens
Opsariichthys bidens
Channa micropeltes
Channa micropeltes
Rocio octofasciata
Rocio octofasciata
High aggression — research tankmates carefully
Oryzias latipes
Oryzias latipes
Oryzias javanicus
Oryzias javanicus
Hyphessobrycon eques
Keep a substantial group; avoid slow or long-finned fish. A community needs more space than the minimum species setup.
Hyphessobrycon eques
Fin nipper — avoid with long-finned tankmates
Keep a substantial group; avoid slow or long-finned fish. A community needs more space than the minimum species setup.
Hemichromis bimaculatus
Hemichromis bimaculatus
Helostoma temminckii
Helostoma temminckii
Boraras urophthalmoides
Boraras urophthalmoides
Hyphessobrycon pulchripinnis
Hyphessobrycon pulchripinnis
Corydoras julii
Corydoras julii
Peckoltia compta
Peckoltia compta
Homaloptera orthogoniata
Homaloptera orthogoniata
Bedotia madagascarensis
Bedotia madagascarensis
Carinotetraodon travancoricus
Carinotetraodon travancoricus
Ancistrus ranunculus
Ancistrus ranunculus
Hypsophrys nicaraguensis
Hypsophrys nicaraguensis
Paracheirodon innesi
Paracheirodon innesi
Danio kyathit
Danio kyathit
Hyphessobrycon bentosi
Hyphessobrycon bentosi
Astronotus ocellatus
Astronotus ocellatus
Oxyropsis carinata
Oxyropsis carinata
Hoplisoma gossei
Keep a group with clean substrate and a base of at least 90 × 30 cm.
Hoplisoma gossei
Keep a group with clean substrate and a base of at least 90 × 30 cm.
Corydoras panda
Corydoras panda
Garra flavatra
Garra flavatra
Yaoshania pachychilus
Yaoshania pachychilus
Macrognathus siamensis
Macrognathus siamensis
Trichopodus leerii
Trichopodus leerii
Stiphodon pelewensis
Stiphodon pelewensis
Hoplisoma paleatum
Keep a group with clean sand or smooth gravel and a base of at least 61 × 38 cm.
Hoplisoma paleatum
Keep a group with clean sand or smooth gravel and a base of at least 61 × 38 cm.
Misgurnus anguillicaudatus
Misgurnus anguillicaudatus
Corydoras pygmaeus
Corydoras pygmaeus
Trichopsis pumila
Trichopsis pumila
Pelvicachromis pulcher
Pelvicachromis pulcher
Mikrogeophagus ramirezi
Mikrogeophagus ramirezi
Rasbora lacrimula
Rasbora lacrimula
Stiphodon atropurpureus
Stiphodon atropurpureus
Hyphessobrycon sweglesi
Hyphessobrycon sweglesi
Glossolepis incisus
Glossolepis incisus
Heros efasciatus
Provide a base of at least 120 × 45 cm; allow more space for a pair or group.
Heros efasciatus
Provide a base of at least 120 × 45 cm; allow more space for a pair or group.
Erythrinus erythrinus
Best kept singly; smaller fish are prey and conspecifics may fight lethally. Fit a secure cover.
Erythrinus erythrinus
High aggression — research tankmates carefully
Best kept singly; smaller fish are prey and conspecifics may fight lethally. Fit a secure cover.
Geophagus steindachneri
Geophagus steindachneri
Geophagus surinamensis
Geophagus surinamensis
Sewellia lineolata
Sewellia lineolata
Crossocheilus reticulatus
Crossocheilus reticulatus
Herichthys cyanoguttatus
Herichthys cyanoguttatus
Rhodeus ocellatus
Provide a cool winter rest, planted cover and good oxygenation.
Rhodeus ocellatus
Pethia conchonius
Pethia conchonius
Hyphessobrycon rosaceus
Hyphessobrycon rosaceus
Sturisomatichthys festivus
Sturisomatichthys festivus
Panaque nigrolineatus
Panaque nigrolineatus
Pethia padamya
Pethia padamya
Hemigrammus rhodostomus
Hemigrammus rhodostomus
Poecilia latipinna
Poecilia latipinna
Sawbwa resplendens
Sawbwa resplendens
Dario dario
Dario dario
Corydoras schwartzi
Corydoras schwartzi
Betta splendens
Keep males separate; provide steady heat, gentle flow, surface access and a cover.
Betta splendens
High aggression — research tankmates carefully
Keep males separate; provide steady heat, gentle flow, surface access and a cover.
Crossocheilus oblongus
Crossocheilus oblongus
Hasemania nana
Hasemania nana
Tanakia himantegus
Tanakia himantegus
Channa asiatica
Channa asiatica
Xiphophorus maculatus
Xiphophorus maculatus
Copella arnoldi
Copella arnoldi
Pseudomugil gertrudae
Pseudomugil gertrudae
Corydoras sterbai
Corydoras sterbai
Boraras naevus
Boraras naevus
Aplocheilus lineatus
Aplocheilus lineatus
Puntigrus tetrazona
Keep a substantial group; avoid slow or long-finned tankmates because of fin nipping.
Puntigrus tetrazona
Fin nipper — avoid with long-finned tankmates
Keep a substantial group; avoid slow or long-finned tankmates because of fin nipping.
Scobinancistrus aureatus
Scobinancistrus aureatus
Stiphodon surrufus
Stiphodon surrufus
Iriatherina werneri
Iriatherina werneri
Trichogaster trichopterus
Trichogaster trichopterus
Rasbora trilineata
Rasbora trilineata
Barbonymus schwanenfeldii
Barbonymus schwanenfeldii
Farlowella vittata
Farlowella vittata
Hoplisoma weitzmani
Keep a group in a mature aquarium with clean sand or smooth, rounded gravel.
Hoplisoma weitzmani
Keep a group in a mature aquarium with clean sand or smooth, rounded gravel.
Apistogramma borellii
Apistogramma borellii
Leporacanthicus galaxias
Leporacanthicus galaxias
Atya gabonensis
Atya gabonensis
Channa orientalis
Channa orientalis
Farlowella acus
Farlowella acus
Loricaria simillima
Loricaria simillima
Tanichthys albonubes
Tanichthys albonubes
Cichlasoma salvini
Cichlasoma salvini
Toxotes blythii
Toxotes blythii
Danio rerio
Danio rerio
Botia striata
Botia striata
Vittina natalensis
Provide algae-covered surfaces and stable water; protect snails from predatory tankmates.
Vittina natalensis
Provide algae-covered surfaces and stable water; protect snails from predatory tankmates.
Otocinclus cocama
Otocinclus cocama
Hypancistrus zebra
Hypancistrus zebra
Rhinogobius zhoui
Rhinogobius zhoui
Mastacembelus armatus
Mastacembelus armatus