Black Harlequin Rasbora - Planted Tank Mates

Black Harlequin Rasbora

1.5″ | 6 or more | 10 gal

PH 6-7.2 | Peaceful

Trigonostigma heteromorpha

Characteristics:

Max Size: 1.5″

Care Level: Easy

Behavior: Peaceful

Dwelling: Middle of tank

Diet: Omnivore

Water Movement: Slow Moving

Parameters

Temperature: 72 – 82

PH: 6 – 7.2

dGH: 3 – 6

dKH: 4 – 8

Tank Size: 10 gal

Grouping: 6 or more

Tank Mates

Caridina and Neocaridina Shrimp, Tetras, Rasboras, Danios, Hatchetfish, Mollies, Dwarf Gourami, Angelfish, Guppies, Loaches and Otocinclus

Notes

Avoid aggressive or territorial species or large fish with big mouths.

Quick Comparison

Black Harlequin Rasbora removeCelestial Pearl Danio removeCardinal Tetra Species Profile - Water Parameters & Care removeEmerald Dwarf Rasbora removeOdessa Barb removeBlack Emperor Tetra remove
NameBlack Harlequin Rasbora removeCelestial Pearl Danio removeCardinal Tetra Species Profile - Water Parameters & Care removeEmerald Dwarf Rasbora removeOdessa Barb removeBlack Emperor Tetra remove
ImageBlack harlequin rasbora fish (Trigonostigma heteromorpha)Celestial pearl or Galaxy rasbora fish (Danio margaritatus)Cardinal tetra fish (Paracheirodon axelrodi)Emerald dwarf rasbora fish (Danio erythromicron).Odessa barb (Pethia padamya).Black emperor tetra fish (Nematobrycon palmeri var. Amphiloxus Black).
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Description

1.5" | 6 or more | 10 gal

PH 6-7.2 | Peaceful

3/4" | 6 or more | 10 gal

PH 6.5 - 7.5 | Peaceful

2" | 6 or more | 10 gal

PH 6.2-7 | Peaceful

1.5" | 6 or more | 20 gal

PH 7 - 8 | Peaceful

3" | 5 or more | 30 gal

PH 6-8 | Semi-Aggres.

2" | 6 or more | 10 gal

PH 6.2-7.2 | Peaceful

Content

Trigonostigma heteromorpha

Characteristics:

Max Size: 1.5″

Care Level: Easy

Behavior: Peaceful

Dwelling: Middle of tank

Diet: Omnivore

Water Movement: Slow Moving

Parameters

Temperature: 72 – 82

PH: 6 - 7.2

dGH: 3 – 6

dKH: 4 – 8

Tank Size: 10 gal

Grouping: 6 or more

Tank Mates

Caridina and Neocaridina Shrimp, Tetras, Rasboras, Danios, Hatchetfish, Mollies, Dwarf Gourami, Angelfish, Guppies, Loaches and Otocinclus

Notes

Avoid aggressive or territorial species or large fish with big mouths.

Danio margaritatus

Characteristics:

Max Size: 3/4″

Care Level: Easy

Behavior: Peaceful

Dwelling: Middle of tank

Diet: Omnivore

Water Movement: Slow Moving

Parameters

Temperature: 68° – 74°

PH: 6.5 – 7.5

dGH: 3 – 10

dKH: 3 – 7

Tank Size: 10 gal

Grouping: 6 or more

Tank Mates

Tetras, Rasboras, Danios, Hatchetfish, Mollies, Dwarf Gourami, Angelfish, Guppies, Loaches, Otocinclus, dwarf shrimp and snails

Notes

Celestial Pearl Danios, or CPD for short, are relatively new in the fishkeeping world.  They were discovered in the early 2000’s and were initially called Galaxy Rasboras or Fireworks Rasbora.  They’re super popular for their trout-like spotted bodies and bright orange fins.  For a fish that gets only about 3/4” in size, their distinct features really pop out in a community tank.  A bonus is that they can tolerate a wider range of water parameters making them easy to breed.

Learn about Celestial Pearl Danio breeding here.

Paracheirodon axelrodi

Characteristics:

Max Size: 2″

Care Level: Expert

Behavior: Peaceful

Dwelling: Middle of tank

Diet: Omnivore

Water Movement: Slow Moving

Parameters

Temperature: 73° – 81°

PH: 6.2 – 7

dGH: 3 – 6

dKH: 2 – 6

Tank Size: 10 gal

Grouping: 6 or more

Tank Mates

Tetras, Rasboras, Danios, Hatchetfish, Mollies, Dwarf Gourami, Angelfish, Guppies, Loaches, Otcinclus, dwarf shrimp and snails

Care

Cardinal Tetras require a more experienced fish keeper.  They’re very sensitive to water changes and require softer to neutral waters.  They’re able to reach 2” in size and the red & blue markings run the full length of their body.  General rule is 2 gallons per fish. 10 Gallon tank at a minimum, but push for 20 or more for healthy and happy fish. Avoid aggressive or territorial species or large fish with big mouths such as cichlids.

Learn the difference between Cardinal vs. Neon Tetras

Celestichthys erythromicron

Characteristics:

Max Size: 1.5″

Care Level: Moderate

Behavior: Peaceful

Dwelling: Middle of tank

Diet: Omnivore

Water Movement: Slow Moving

Parameters

Temperature: 68 - 74

PH: 7 - 8

dGH: 4 – 12

dKH: 2 – 10

Tank Size: 20 gal

Grouping: 6 or more

Tank Mates

Neocardina shrimp, Neon Tetras, Rasboras, Danios, Hatchetfish, Mollies, Dwarf Gourami, Angelfish, Guppies, Loaches and Otocinclus

Notes

Emerald Dward Rasboras are sensitive to water change and prefer at least a neutral to more alkaline water condition.

Pethia padamya

Characteristics:

Max Size: 3″

Care Level: Intermediate

Behavior: Semi-Aggressive

Dwelling: Middle of tank

Diet: Omnivore

Water Movement: Slow Moving

Parameters

Temperature: 72 - 82

PH: 6 – 8

dGH: 3 - 10

dKH: 4 – 10

Tank Size: 30 gal

Grouping: 5 or more

Tank Mates

Active and fast swimming community fish like Zebra Danios, Cories, Loaches, Platies and Rad-tailed sharks.

Avoid slowing moving, long finned fish like Bettas, Guppies, Gouramis, dwarf shrimps and small snails.

Notes

The Odessa Barb can be aggressive with other Odessas in the same tank, particularly the males exerting dominance.  They may also nip at slower moving fish or fish with long-flowing fins, such as Guppies, Angelfish, Betta fish, Goldfish, Gourami and small snails.

Nematobrycon palmeri var. amphiloxus black

Characteristics:

Max Size: 2″

Care Level: Easy

Behavior: Peaceful

Dwelling: Middle of tank

Diet: Omnivore

Water Movement: Slow Moving

Parameters

Temperature: 73° – 81°

PH: 6.2 – 7.5

dGH: 3 – 6

dKH: 2 – 6

Tank Size: 10 gal

Grouping: 6 or more

Tank Mates

Tetras, Rasboras, Danios, Hatchetfish, Mollies, Dwarf Gourami, Angelfish, Guppies, Loaches, Otcinclus, dwarf shrimp and snails

Care

Black Emperor Tetras are relatively hardy fish. Keep in large groups to minimize male aggression.  They’re able to reach 2” in size, males having blue eyes and females green.  General rule is 2 gallons per fish. 10 Gallon tank at a minimum, but push for 20 or more for healthy and happy fish.  Avoid aggressive or territorial species or large fish with big mouths.

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