Breeding guide11 min
Bristlenose pleco breeding guide
Cave choice, parent condition, male care and grow-out planning.
bristlenosecave spawnerfry
AquaNexus knowledge library
Breeding
Parent selection, spawning, fry care, grow-out and responsible population planning.
14 complete guidesOriginal AquaNexus writingReviewed 2026-07-20
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Breeding guide11 min
Corydoras breeding basics
Condition adults, recognise spawning, protect eggs and manage first foods.
corydoraseggsfry
Breeding guide10 min
Grow-out tank management
Control feeding, size gaps, waste and stocking pressure as fry grow.
grow-outjuvenilesstocking
Practical guide6 min
How do I use and clean a spawning mop?
A spawning mop gives adhesive egg layers a removable spawning surface; clean handling and dedicated equipment reduce egg damage and cross-contamination.
spawning mopadhesive eggsbreeding hygiene
Practical guide6 min
How should I condition fish for breeding?
Conditioning means building healthy reproductive adults with suitable nutrition and stable husbandry, not simply overfeeding or forcing environmental triggers.
broodstockconditioningspawning
Breeding guide10 min
Livebearer breeding system
Plan parent groups, fry space, sex separation and rehoming before numbers explode.
livebearerbreedingfry
Practical guide6 min
What should I feed fish fry as they grow?
Choose fry food by mouth size, feeding behaviour and developmental stage, then increase particle size and variety as the fish can reliably capture larger food.
first foodsfry feedinglive foods
Practical guide6 min
When should I use an egg tumbler?
Egg tumblers are useful for selected loose eggs that normally receive movement or parental fanning, but excessive flow can damage embryos.
egg tumblerincubationfish eggs
Practical guide6 min
Why are fish eggs turning white?
White fish eggs are often infertile or no longer developing, but colour alone does not prove fungus; check development, flow and the rest of the clutch before treating.
fish eggsfertilityegg fungus
Practical guide6 min
Why are fish fry dying in the first week?
Early fry losses usually need a timeline: water quality, first feeding, oxygen, intake safety, temperature and developmental problems can overlap in the first days.
fish fryfirst feedingfry mortality
Practical guide6 min
Why are my breeding fish not spawning?
A compatible-looking pair may still fail to spawn because of maturity, sex identification, body condition, environment, social stress, season or unsuitable spawning structure.
spawning failurebroodstockbreeding cues
Practical guide6 min
Why are my fish eggs not hatching?
Before calling a clutch failed, confirm the species incubation window, fertilisation, temperature, oxygen and developmental progress.
egg incubationhatchingfish breeding
Practical guide6 min
Why are parent fish eating their eggs or fry?
Parental predation can be normal for the species or triggered by stress, poor spawning conditions or repeated disturbance; the safest response depends on the breeding strategy.
parental careegg predationfry survival
Practical guide6 min
Why are some fish fry not growing?
Uneven fry growth can come from food access, hatch timing, density, social competition, health or normal individual variation; use size trends rather than one snapshot.
fry growthgradinggrow-out
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