Breeding / Open substrate spawners
Green terror
Open substrate spawners · Easy

Breeding the green terror

Open spawner on hard surfaces such as flat rocks; the female tends the eggs and larvae while the male defends the territory.

Step by step

Pairing

Buy a group and let pairs form.

Breeding tank

A 55 gallon (200 L) tank with flat rocks and caves, 24-27 C.

What starts it

Warm water and good food. Pairs clean a flat rock.

Eggs and young

Up to about 400-600 eggs; hatch in about 3-4 days.

Raising the fry

Feed baby brine shrimp and crushed flake. Parents guard fry. Separate at 3 cm.

Common mistakes
  • Tank too small
  • Pairing two males
  • Poor water quality

Male or female

Males are much larger than females and adult males grow a pronounced forehead hump. The white or gold-orange edge on the tail and dorsal fin is a colour form, not a sign of sex.

Can I breed it in my tank?

  • Good for a first breeding project.

Day-by-day plan

Typical for open substrate spawners

  1. 21 days beforeLet a pair form

    Grow up a group and let a pair choose each other. Give them a flat stone or broad leaf.

  2. Day 0Spawning

    The pair cleans the stone and lays rows of eggs. Both guard them.

  3. Day 3Eggs hatch

    Wrigglers hatch in 2–4 days and are moved to pits by the parents.

  4. Day 7Free swimming

    Feed baby brine shrimp several times a day. Parents often herd the fry.

  5. Day 42Grow-out

    Move fry to a grow-out tank before the parents spawn again.

A general guide for this breeding type. Days change with temperature and species.

Simulator: guided

Stage 1 of 5Let a pair form

Grow up a group and let a pair choose each other. Give them a flat stone or broad leaf.

Simulator: try it yourself

Set up a virtual breeding tank and see what would likely happen.

No spawning
  • Without live or frozen food the parents aren't in breeding condition.

An educational estimate from the breeding rules, not a promise.