What To Feed Your Tilapia: A Practical Guide For Smallholder Farmers
On a small pond outside Kadoma, two farmers stand on a makeshift wooden jetty at sunrise, scattering pellets in slow, even arcs. The water erupts with tilapia breaking the surface, then settles back to a quiet green. Every handful costs money — and, managed well, every handful comes back as kilograms of fish at harvest.
Feed is usually the biggest ongoing cost in tilapia farming, and the biggest chance to either grow fish well or waste hard-earned cash. Getting feeding right is what separates truly profitable farmers from those who just break even.
What Tilapia Actually Eat
Tilapia are omnivores. In a natural pond, they graze on algae, aquatic plants, insects, tiny invertebrates, and organic matter from the pond bottom. A well-fertilised pond produces this natural food, which can cut down how much supplemental feed you need.
But natural food alone is not enough if you want fast growth. Without extra feed, tilapia take much longer than four to six months to reach market size, and final weights are often disappointing.
FFA Explainer:
Natural pond food is like free side dishes. Pellets or home-made feed are the main meal. When both are present in the right balance, fish grow faster and feed costs per kilogram of fish produced go down.
Commercial Tilapia Pellets
Commercial floating pellets with 32–35% crude protein are ideal for tilapia grow-out. They are formulated to provide balanced protein, energy, vitamins, and minerals.
Benefits include:
- Easy to portion and store.
- Floating pellets let you see uneaten feed and adjust quickly.
- Consistent growth and shorter production cycles.
Brands available in Zimbabwe include Novatek and some imported South African feeds. Many farmers near Harare, Bulawayo, and Mutare access these through agro-dealers and farm supply shops.
The main drawback is cost. Commercial feed can account for 60–70% of total production costs. For small ponds, the numbers can still work, especially when you sell into higher-value markets such as restaurants or live-fish buyers. But many farmers now combine commercial feed with locally milled options to keep costs under control.
Making Your Own Feed
To reduce costs, many Zimbabwean fish farmers formulate their own feed using ingredients already common in livestock rations. A basic low-cost tilapia feed of about 25% protein can be made from:
- 40% maize bran.
- 30% soya cake (full fat).
- 20% sunflower cake.
- 10% fishmeal or dried termites (for a protein boost).
Steps:
- Weigh and mix the dry ingredients thoroughly.
- Moisten lightly with clean water until the mixture holds together.
- Press through a hand mincer or simple pelletiser to form pellets.
- Spread pellets thinly on a clean surface and dry completely in the sun.
- Store in a cool, dry place in sacks or buckets, away from rats and moisture.
This type of home-made feed will not match the growth performance of high-quality commercial pellets, but it is significantly cheaper and can still deliver acceptable growth, especially when combined with a fertilised pond that supplies natural food.
Zimbabwean farmer groups in districts like Mhondoro and Goromonzi have started collective feed mixing to share equipment and buy ingredients in bulk.
How Much And How Often To Feed
Tilapia growth depends on how much they eat relative to their body weight.
- Feed at 3–5% of total fish body weight per day for growing fish, split into two meals — morning and late afternoon.
- As fish get larger (above 200–250 g), reduce to 2–3% of body weight per day.
Many pond farmers don’t have scales to weigh fish accurately. A practical method is to use observation:
- Start with an estimated amount based on past experience.
- Feed and watch for 20–30 minutes.
- If pellets disappear quickly and fish are still actively feeding, increase the next day’s ration by about 10%.
- If pellets remain uneaten after 20–30 minutes, reduce the ration immediately.
Remember: uneaten feed is not just wasted money. It sinks, decomposes, and can cause water quality problems and fish kills.
Pond Fertilisation As A Feed Strategy
Fertilising your pond is like planting a garden under the water. It stimulates the growth of algae and plankton, which tilapia happily eat between feeding times.
Organic fertiliser
- Use well-composted cattle or chicken manure.
- Apply at 200–500 kg per hectare of pond surface every two weeks.
- Always compost first. Fresh manure can release ammonia and other harmful substances that stress or kill fish.
Inorganic fertiliser
- Use compound fertiliser such as AN or CAN in small, controlled doses.
- Apply around 25–50 kg per hectare monthly to stimulate phytoplankton.
- Dissolve fertiliser in a bucket of pond water and splash evenly across the pond surface.
FFA Explainer:
Phytoplankton are microscopic plants that turn pond water green. They are a natural food source for tilapia, provide oxygen during the day, and help support higher stocking densities when managed well.
Simple But Powerful Feeding Habits
Once you have the right feed, small daily habits make a big difference:
- Feed at the same spot and time each day. Fish quickly learn routines and will gather there, making it easier to observe appetite and health.
- Watch the weather. Stop or greatly reduce feeding in cold weather below about 18°C. Tilapia become sluggish, and uneaten feed builds up on the bottom.
- Stop feeding two days before harvest. This allows fish to empty their guts, improving taste, shelf life, and cleanliness during processing.
Farmers from areas such as Nyanga and Chinhoyi say that once a steady feeding routine is established, daily work becomes predictable and fish respond with strong, even growth.
Feed Smart, Harvest Strong
Good feeding practice is not complicated, but it demands consistency and attention. Understand what tilapia eat, choose the right combination of pellets and home-made feed, fertilise your pond wisely, and adjust daily based on how your fish respond.
From a small 200 m² pond in Domboshava to larger operations near Kariba, the principle is the same: every handful of feed should be an investment, not an expense. Watch your fish closely, refine your routine, and your feeding decisions will show their true value at harvest.
Article prepared by FFA Research Team | Farm Future Africa | farmfutureafrica.co.zw
📲 Subscribe to our WhatsApp Channel to Get Our Updates On Your Mobile
About The Author
