Growing Fish Food at Home
For mandarin dragonets, scooter blennies, or seahorse tanks, copepods aren't optional — they're the main food source. Even without specialist feeders, a thriving copepod population benefits every reef tank through natural food chain support and microfauna diversity.
Why Copepods Matter
Copepods are tiny crustaceans (0.5–3mm) that graze on algae and detritus. In a reef tank they feed mandarin dragonets, support corals (especially NPS and filter-feeders), contribute to sandbed health, and process detritus.
The Main Species
Tisbe Pods — The workhorse. Lives in sandbed and rockwork, breeds fast, tolerates a wide range of conditions.
Tigriopus Pods — Larger and easier to culture separately. Good for direct feeding as fish can target them.
Apocyclops Pods — Planktonic species that stays in the water column, ideal for corals and filter feeders.
A mixed pod bottle covers most bases.
Refugium Setup
The best way to maintain a permanent copepod population:
- A sump section or separate 20–40 litre container
- Chaetomorpha algae for surface area and nutrient export
- Reverse light cycle to stabilise pH
- Low flow so pods breed rather than getting blasted into the display
- Rubble or bio-media for extra surface area
The refugium continuously seeds the display tank as pods get carried by water flow.
DIY Copepod Culture
For those without a refugium: a 5–10 litre container with saltwater, a starter culture, and a few drops of live phytoplankton every 2–3 days. The population booms in 2–3 weeks. Harvest by pouring culture water into the tank, top up with fresh saltwater, and repeat.
How Often to Seed
With a refugium: automatic. Without: add a bottle of pods every 2–4 weeks for pod-dependent fish, or once a month for general tank health.
Browse live copepods, phytoplankton, and other live foods from UK sellers — fresh, UK-cultured pods are significantly better than imported ones.
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