🍖Feeding a Killifish: carnivore diet, frequency, mistakes
Killifish : A surface carnivore that prefers live and frozen foods: brine shrimp, daphnia, grindal worms. Many killifish snub dry flakes, so keep a stock of frozen food.
In short: 4 to 6 cm as an adult depending on the species, 20 to 50 L depending on the species, water between 20 and 24 °C. A lively, colorful little surface fish, often kept species-only with one male and two or three females. A formidable jumper requiring a gap-free lid; its lifespan varies greatly by species, often only 1 to 3 years.
Feeding a Killifish: diet and habits
The Killifish is a carnivore: live or frozen prey (bloodworms, brine shrimp, daphnia) plus protein-rich granules. It feeds at the surface: serve floating food, in amounts eaten within two minutes at most — everything else ends up as nitrates.
Frequency and variety
One or two small feeds a day for adults, with a weekly fasting day that costs it nothing — overfeeding remains the top cause of tank pollution. Feed at a fixed time: the Killifish learns the ritual fast, and you get the best observation window. Alternate dry, frozen and rinsed thawed prey across the week.
The costly mistakes
Do not mistake conditioning for appetite: a Killifish always looks hungry, but only the ration truly eaten in two minutes counts. Bottom-shelf food disintegrates before it is eaten and loads the water; the price gap to a reliable brand is measured in euros per year. The rest of the profile is on the full Killifish profile.
Frequently asked questions
How often should a Killifish be fed?
One or two small daily feeds eaten within two minutes, plus one fasting day a week. In doubt, underfeed: the water will thank you.
What food suits a Killifish?
A carnivore: live or frozen prey (bloodworms, brine shrimp, daphnia) plus protein-rich granules — served in floating form, as it feeds at the surface.
The guides that apply to you
- Feeding an axolotl: which foods, how often and how much
The axolotl is a strict carnivore with simple but precise needs. Which foods to choose, how often to feed it by age and how to size portions without overfeeding.
- Going away for two weeks: how to manage the aquarium without stress?
Going on holiday for two weeks with an aquarium: healthy adult fish fast for a week without risk; beyond that, an automatic feeder or a neighbour. The full departure plan.
- Fasting your fish one day a week: good practice or myth?
Many fishkeepers skip one feeding a week for their fish: a habit backed by real digestive benefits, not just a passing trend.
- Going on holiday without an automatic feeder: are slow-release food blocks reliable?
Slow-release food blocks, a supervised fast, or a trusted neighbour: the alternatives to an automatic feeder for a few days away.