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Breeding / Egg scatterers
Egg scatterers · Moderate

Breeding the three-lined pencilfish

Egg-scattering free spawner with no parental care; spawns over fine-leaved plants, mops or mesh in soft, slightly acidic water, and adults eat the eggs.

Full species page

Step by step

Pairing

Keep a group with several females and condition on live foods; pairs form on their own.

Breeding tank

20-30 L tank with soft acidic water (pH 5.5-6.5), dense fine-leaved plants or java moss, dim light and a gentle sponge filter.

What starts it

Soft acidic water, dim light and daily live baby brine shrimp; spawning is usually in the morning.

Eggs and young

Adults are removed after 2-3 days in the spawning tank and the first fry appear about 3 days later; first foods are Paramecium or 5-50 micron dry food. No egg count found in the sources checked.

Raising the fry

Feed infusoria, then fine fry food and newly hatched brine shrimp; fry are tiny and need very small food.

Common mistakes
  • Hard alkaline water
  • Strong flow
  • Leaving adults with the eggs

Male or female

Adult males are more intensely coloured, especially in spawning condition; females are noticeably rounder-bodied.

Can I breed it in my tank?

  • Use a separate small tank with a sponge filter and spawning mops, so the eggs aren't eaten.
  • Takes some experience.

Day-by-day plan

Typical for egg scatterers

  1. 14 days beforeCondition the parents

    Feed live or frozen food twice a day. Keep males and females apart if you can.

  2. Day 0Spawning

    Eggs are scattered over mops or fine plants, often at first light. Remove the parents straight after.

  3. Day 1Eggs hatch

    Most eggs hatch in 1–2 days. Keep the tank dim and remove white (fungused) eggs.

  4. Day 4Free swimming, first food

    Fry use up the yolk and start swimming. Feed infusoria or liquid fry food several times a day.

  5. Day 8Baby brine shrimp

    Switch to newly hatched brine shrimp or microworms. Start small, daily water changes.

  6. Day 21Crushed flake

    Add finely crushed flake. Sort fry by size so the big ones don't eat the small ones.

  7. Day 60Ready to move

    Most small fish reach about 2 cm in 2–3 months and can join the main tank.

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

Simulator: guided

Stage 1 of 7Condition the parents

Feed live or frozen food twice a day. Keep males and females apart if you can.

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.