Freshwater Fish Temprature Chart

Freshwater Aquarium Fish Temperature Chart

Updated March 14, 2019

Lowest Temp.

Download Excel Version of Fresh Water Temperture Chart

Highest Temp.

Optimal Temp.

For research click on the

name of the fish.

Celcius and Fahrenheit

Tank size suggestions are the minimum size for a single fish, or a pair, or one shoal group.

Sorting Feature

in/cm

Please pick the proper size tank for your stocking plans.

Possible

17.7

18.3

18.8

19.4

20.0

20.5

21.0

21.6

22.2

22.8

23.3

23.9

24.4

25.0

25.5

26.1

26.7

27.2

27.8

28.3

28.8

23.9

30.0

Group

Recemmeded

Center Piece, Top or Mid Water

Adult Size

Sizes

Tank Size

Notes and suggestions

Betta Splendens

Male Betta

2.8 / 7

3g / 11L

Two males in the same tank will fight to the death.

Female Betta

2 / 5

1 or a sorority

3g / 11L

With caution, can keep serveral females in a sorority in 20g/75.7L or larger tank.

Peaceful Imbellis Betta

2 / 5

2 or more

10g/38L

Peaceful, can be kept in groups with other fish, but with caution and right tank size.

Gourami

Sparkling Gourami

1.5 / 3.8

2 or more

10g/38L

Very peaceful, can be kept in community tank with other peaceful fish.

Dwarf Gourami

3 / 7.6

10g/38L

Peaceful Commity Fiah

Honey Gourami

3.2 / 8

10g/38L

Peaceful Commity Fiah

Pearl Gourami

4.7 / 12

20g/75.7L

Semi-aggressive

Gold, Blue, 3 Spot Gourami

6 / 15.24

1 or pair male & female

35g / 132L

These species of Gourami get very large and can be aggressive.

Kissing Gourami

6 / 15.24

75g/284L

The Kissing Gourami can get ver large. Only 1 to a tank, unless breeding.

Paradise Gourami

4 / 10

1 or pair male & female

29g/109.7L

Community tank but with caution . Two males will fight and will attack long finned fish.

Chocolate Gouramis

2.5 / 6.35

2 male & female

20g/75.7L

Gentle, shy nature, keep only if willing to provide the special care this species requires.

Thick-Lipped Gouramis

4 / 10

29g/109.7L

Peaceful and shy, keep in well planted commuity tank. Can keep two or more together.

Cichlids

African Butterfly

3 / 7.6

4 or more

29g/109.7L

Peaceful can be kept in community tank. Always do your research to make sure.

South American Cichlids in Yellow.

Angel Fish

4 / 10.16

1 or pair male & female

55g/208.2L

Can be aggressive toward each other, nipping fish like barbs should not be in same tank.

Apistogramma

3.5 / 9

4 or more

30g / 113.5

Beautiful but difficult to care for. Approximately 70 species, requires low ph.

Africa Cichlids in light brown

Blood Parrot

8 / 20.3

55g/208.2L

Artificial hybrid cross between cichlid species. Can be kept with tank mates, with caution.

Bolivan Ram

3 / 7.6

6 or more

29g/109.7L

Beautiful and peaceful, only for experienced fish keepers

Artifically bred by breeders in light blue.

8 / 20

Convict

4 / 10

30g / 113.5

Not for community tanks with peaceful fish. It is always best to keep with other Cichid types.

Discus

6 / 15

1 or more

55g/208.2L

Not for beginners, only expereinced fish keepers should keep this fish.

There is at least 1650 different species

Electric Blue Acara

7.9 / 20

A pair male and female

55g/208.2L

Easy to care for, good for beginners, using medium to large size tanks.

of cichilds from different parts

Electric Yellow Cichlid

5 / 12.7

2 or more

55g/208.2L

Mouth breeders, easy to care for, likes sandy bottom and rocky caves to hide or breed.

of the world. Many from Africa, and South

Firemouth Cichlid

6.7 / 17

depends on setup

30g / 113.5

Semi-Aggressive unless paired off for breeding, then aggressively protects territory.

America. Some are small and peaceful

Flowerhorn

16 / 40.6

1 unless breeding

75g/284L

Artificial hybrid cross between cichlid species. Very aggressive but easy to care for.

doing well in community tanks. While

German Blue Ram

3 / 7.6

1 pair m/f

20g/75.7L

Not for beginners, only expereinced fish keepers should keep this fish.

others get very large and very aggressive

Green Terror

12 / 31

A pair male and female

100g/378L

Very aggressive and needs large tanks, can be mistaken for smaller less aggressive species.

and should not be kept in community

tanks with peaceful species of fish.

Jack Dempsey

10 / 25.4

75g/284L

Very Aggressive and will eat smaller fish. Can be kept with fish of its size in large tanks.

These large aggressive species should

Jewel

5.5 / 14

30g / 113.5

Aggressive while breeding and caring for fry.

be kept in a species type only tank or

Jurupari Earth Eater

9.8 / 25

A pair male and female

55g/208.2L

A bottom feeder that searches for food by turning over rocks and digging in sand.

kept with other large fish of the same type

Keyhole Cichlid

5 / 12.7

A pair male and female

30g / 113.5

Generally Peaceful, keep with other peaceful but same size tank mates.

Kribensis Cichlid

4 / 10

2 or more

20g/75.7L

Beautiful little cichlid, easy care, good for beginners and commnity tank.

Always do research on type of cichlid to be

Laetacara dorsigera

3 / 7.6

Needs pair male & female

30g / 113.5

Peaceful, keep in planted tank with places to hide or breed, rock caves, ect.

kept, because it is impossible to get

Neolamprologus pulcher

5 / 13

15g/56.7L

Easy to care for, good for beginners.

all the information needed from just one

Oscar

15 / 38

75g/284L

Oscars are very aggressive fish and need large tanks to thrive.

one source.

Orange Leleupi Cichlid

4 / 10

1 or a pair (M/F)

20g/75.7L

Semi-aggressive, intermediate experience in fish keeping.

Peacock Cichlid

6 / 15

Regani Dwarf Pike Cichlid

5 / 12.7

A pair male and female

30g / 113.5

There are about a 100 different species, so make sure to know which species you buying.

Live Bearing

Guppy

2 / 5

1 male to 3 females

10g/38L

Guppies male will harass females for breeding putting stress on the females.

Different variations, swordtail, sailfin, etc.

Molly

4 / 10.16

1 male to 3 females

20g/75.7L

Molly needs salt in their water, teaspon to 5 g/19L

Platy

2.5 / 6.35

1 male to 3 females

20g/75.7L

Like all live bearing fish, be prepared to have lots of fry.

Endlers

1 / 2.5

School of 6 or more

20g/75.7L

Peaceful and easy care, very colorful.

Shoaling Fish, Top or Mid Water

Red Eye Tetra

2.75 / 7

School of 6 or more

20g/75.7L

Peaceful and good for beginners.

Black Skirt Tetra

2 / 5

Shoaling 5 or more

20g/78.7L

Peaceful for the most part but can nip long finned fish.

Black Neon Tetra

1.5 / 3.8

Shoaling 6 or more

10g/37.8L

Peaceful community fish, best kept in 6 plus schooling shoal.

All the fish listed in this area, Tetra,

Bleeding Heart Tetra

3 / 7.6

Shoaling 4 or more

15g/56.7L

Can nip long fined fish like Angel Fish or Betta.

Danio, Rasboras, etc. do better in well

Cardinal Tetra

2 / 5

Shoaling 6 or more

15g/56.7L

Peaceful community fish, best kept in 6 plus schooling shoal.

Planted Aquariums and in large enough

Ember Tetra

0.75 / 2

Shoaling 8 or more

10g/37.8L

Peaceful community fish. Keep only with other peaceful commnity fish.

schools to keep some species form

Emperor Tetras

3 / 7.6

Shoaling 6 or more

20g/78.7L

Peaceful & easy to care for, keep 6 or more to keep this fish from nipping fins of other fish.

nipping the fins of other fish.

Green Neon Tetra

1 / 2.5

Shoaling 5 or more

10g/37.8L

Looks like Neon Tetra, but smaller gets only about 1 inch long.

Neon Tetra

1.5 / 3.8

Shoaling 6 or more

10g/37.8L

Peaceful community fish, best kept in 6 plus schooling shoal.

These fish perfer well planted tank.

Rosy Tetra

1.6 / 4

Shoaling 6 or more

15g/56.7L

Peaceful community fish, best kept in 6 plus schooling shoal.

Lemon Tetras

2 / 5

Shoaling 6 or more

10g/37.8L

Peaceful community fish, best kept in 6 plus schooling shoal.

Danio

2 / 5

Shoaling 6 or more

20g/75.7L

Cool water fish, the Giant Danio can get up 4" long, needs 40g/151.4L tank

Celestial Pearl Danios

0.75 / 2

Shoaling 10 or more

10g/37.8L

Timid species should be kept in a heavily-planted tank, with a dark substrate.

Gold Ring Danios

1.5 / 3.8

Shoaling 10 or more

20g/75.7L

Very hardy and peaceful community fish.

Chili Rasboras

0.75 / 2

School 10 or more

10g/37.8L

Small peaceful, should only be kept with similar species in a community.

Harlequin Rasbora

2 / 5

Schooling 10 or more

20g/75.7L

Peaceful community fish. Keep only with other peaceful commnity fish.

Lambchop Rasbora

1 / 2.5

Shoaling 8 or more

15g/56.7L

Peaceful community fish. Keep only with other peaceful commnity fish.

Peacock Goby

3 / 7.5

10g/37.8L

Beautiful and peaceful, can be kept in larger numbers in bigger tanks.

Scarlet Badis

1 / 2.5

1 male to 2 or more female

10g/37.8L

Beautiful and small perch like fish, aggressive to other males of its species.

White Cloud Minnows

1.5 / 3.8

school 8 or more

20g/75.7L

Peaceful, has a wide range of temperture tolerances.

Boeseman's Raindbow Fish

4.5 / 11.43

Shoaling 5 or more

55g/208.2L

Peaceful, need well planted tank with open swimming area. Gets large so needs large tanks.

Dwarf Neon Rainbow Fish

2.5 / 6.35

Shoaling 10 or more

30g / 113.5

Not recommended for beginners, sensitive to water condition changes.

Bottom Fish

Hill Stream Loach

2.5 / 6.3

Shoaling 3 or more

55g/208.2L

Peaceful, will eat algae as well as protein based foods. Cool water fish, and high flow rate.

All species especially the Cory need to be

Clown Loach

12 / 30

School 4 or more

75g/284L

Peaceful, but not for beginning hobbiest, can live up to 10 yrs.

kept in 5 or more species type schools.

Kuhli Loach

4.5 / 11

School 3 or more

20g/75.7L

Peaceful, do not place with aggressive fish. Prefers sand for subtrate.

Good scavengers that will scour the

Dojo Loach

11.3 / 28.58

School 3 or more

55g/208.2L

Low Temp 54 / 12 (Not shown on this chart) Peaceful, needs sand for subtrate.

bottom for bits of food left after feeding

Pepper Corydoras

2.3 / 5.84

school 6 or more

29g / 110L

Peaceful, do not place with aggressive fish. Easy to care of, good for beginners.

other fish. It is best to have sandy or other

Sterbai Corydoras

2.6 / 6.5

school 6 or more

20g/75.7L

Peaceful, do not place with aggressive fish. Easy to care of, good for beginners.

types of subtrate making it easier for

Albino Corydoras

2.8 / 6.99

school 6 or more

20g/75.7L

Peaceful, do not place with aggressive fish. Easy to care of, good for beginners.

Cory to savenge for food.

Bronze Corydoras

2.5 / 6

school 6 or more

20g/75.7L

Peaceful, do not place with aggressive fish. Easy to care of, good for beginners.

But don't depend on left over fish food

Panda Corydoras

1.5 / 3.8

school 6 or more

20g/75.7L

Peaceful, do not place with aggressive fish. Easy to care of, good for beginners.

for these fish to survive on. Feed them

Dwarf Corydoras

1 / 2.5

Shoaling 5 or more

10g/37.8L

Peaceful, should not be kept with aggressive species of fish, etc.

with sinking food pellets designed for

Julii Corydoras

2.5 / 6

School 4 or more

20g/75.7L

Peaceful, should not be kept with aggressive species of fish, etc.

bottom feeders.

Emerald Corydoras

3.5 / 9

school 6 or more

29g / 110L

Peaceful, should not be kept with aggressive species of fish, etc.

Arched (Skunk) Corydoras

2.5 / 6.35

school 6 or more

20g/75.7L

Peaceful, do not place with aggressive fish. Easy to care for, good for beginners.

Pleco & Algae Eaters

Bristlenose Pleco

5 / 12.7

1 or a pair m/f

55g/208.2L

Good bottom cleaners. Peaceful except two males will fight for territory.

Blue Eyed Pleco

24 / 61

Very Large

Rare species of Pleco and very expensive, only for extremely large tanks.

Rubberlip Pleco

7 / 17.7

1 to a tank

55g/208.2L

Peaceful, eats algae, algae wafers, and protien based foods.

Clown Pleco

3 / 7.6

29g / 110L

Peaceful and eats wood, so soft wood should be provided. Will eat plants

Otocinclus algae eater

1.5 / 3.8

School 4 or more

20g/75.7L

Peaceful, delicate and can die easly, can be kept in community with no aggressive fish.

Chinese Algae Eater

11 / 28

55g/208.2L

Mistaken for the peacful Oto, beaware eats algae when young, but other fish when mature.

Siamese Algae Eater

6 \ 15.24

29g / 110L

Peaceful and can be kept in groups of several or more with other community fish.

Siamese Flying Fox

6 \ 15.24

29g / 110L

Keep with barbs in a robust community, too aggressive for the average peaceful aquarium.

Barbs & Sharks

Tiger Barbs

3 / 7.6

Shoaling 6 or more

20g/78.7L

Can be very aggressive and should not be with long fin Angel or Gourami.

Gold Barb

3 / 7.6

Shoaling 5 or more

20g/78.7L

Community tank with caution, might nibble on long fins. Might root up and chew up plants.

Red Tail Shark

6 / 15

55g/208.2L

Only one to a tank, aggressive to other sharks of its kind.

Bala Shark

15 / 38

Shoaling 5 or more

100g/378L

Not aggressive but grow very large, should only be kept in large tanks.

Rainbow Shark

6 / 15

55g/208.2L

Only one to a tank, aggressive to other sharks of its kind.

Other types of fish

Upside Down Catfish

4 / 10.16

Shoaling 4 or more

20g/75.7L

Peaceful community fish, best kept in at least 4 schooling shoal.

Hatchet Fish

2 / 5

Shoaling 6 or more

20g/75.7L

Peaceful community fish, be careful known to jump out of tank.

Butterfly Fish

5 / 13

1 or a pair male & female

55g/208.2L

Very interesting fish, semi-aggressive, only for experienced fish keepers.

Archer Fish

12 / 31

2 or more

125g/473L

Shoots a jet stream of water to knock insects into the water to eat.

Pea Puffers

1 / 2.5

1 male to 2 females

20g/75.7L

Small fish with a lot of character, be careful with tank mates. Do your research.

Spotted Green Puffer

6.7 / 17

20g/75.7L

Aggressive, and should only be kept by experienced fish keepers.

Pictus Catfish

6 / 15.2

55g/208.2L

Do not use a net, do not keep with smaller fish, slightly poisonous spines.

Zig Zag Eel

30 / 76.2

125g/473L

Should only be in large tanks, 2 teaspoons of aquarium salt for every 2 1/2 gallons.

Sliver Dollar

8 / 20.3

4 or more

100g/378L

For the most part peacful, but will eat small fish. Will eat plants, so pick tough plants.

Ropefish

12 / 30.5

75g/284L

Long snake like fish, shy needing places to hide, escape artist keep tank lid tight.

golden white cloud minnow

Tanganyika Cichlid

CA Cichlids

Julidochromis Cihclids

Saulosi Cichlid

Shell Fish Cichlid