Starting a Backyard Tilapia Pond

Start with one pond you can manage

Tilapia are the fish most small farmers in Ghana try first. They tolerate warm water, take to pellet feed readily and grow to market size in a single season when conditions are good. Their weakness is that they breed very well. Left unmanaged in a pond, they produce large numbers of small fish that compete for food, and the crop becomes a crowd of stunted fish within a season or two.

For a first attempt, plan one earth pond or a small set of tanks, a single stocking, and a feed budget you can keep up every week. Most small farmers do better with a pond of about 100 to 300 square metres that they can feed and check daily than with a large pond that is neglected. If you are also thinking about chickens, our starting guide for poultry farming is worth reading alongside this one, because the two enterprises often share labour and manure. Our poultry calculators can help you cost the chicken side.

Choosing the spot: water, soil and access

Water supply comes first. A borehole, a reliable household supply or a stream can all work, but check before you draw from a watercourse or build on one. Ask the district assembly and the relevant water authority what is allowed at your site, because rules differ from place to place. Avoid low ground that floods in the rains. A flooded pond overflows, and the fish can wash out through the outlet.

Soil decides how much work the pond will be. Clay holds water well, while sandy soil leaks unless it is lined. A simple test is to dig a small hole, fill it, and watch how fast it drains over a few days. Choose a site with a road or path for bringing feed in and fish out, and with some shade from trees, but not so much that the pond gets no sun. Keep the site away from the drainage path of any poultry house, so that rain does not carry manure and dirt into the water.

Earth pond, tank or tub: what each one asks of you

Each option suits a different amount of land, money and time. The table sets out the main choices for a small holding in Ghana. Whatever you choose, the basic rules are the same: good water, a secure inlet and outlet, and enough oxygen for the number of fish you keep.

An earth pond is the cheapest per fish to run once it is built, but it is the hardest to harvest cleanly, because you need nets and a way to drain or seine the water. A tank is quicker to empty and easier to watch, but it needs power or a backup for the aerator. A drum is a good way to learn what the water does, and it will teach you fast.

Water quality you can check yourself

Tilapia are hardy, but they are not forgiving of water that goes bad quickly. Most of the trouble you will face comes from four things: temperature, dissolved oxygen, pH and ammonia. The table shows a comfortable range for each and what to do when a reading is off. A basic test kit helps, but close watching of the fish tells you a great deal on its own.

Fish that gather at the surface early in the morning are telling you the oxygen is low. Treat that as urgent, because the situation can get worse within hours on a cloudy night. Water that smells sour or turns very dark, or fish that stop feeding, point towards ammonia build-up from too much feed or too little water movement.

Buying fingerlings and what to ask the seller

Your fingerlings set the pace for the whole cycle, so it pays to buy carefully. Ask the seller whether the fish are all-male or sex-reversed, because a mixed group of males and females will breed in the pond and fill it with small fish. Find out where the stock was bred, and whether the seller can show healthy fish from the same batch. Fingerlings of roughly 5 to 15 grams are common for a first stocking. Buy them of similar size, because a mixed group will feed unevenly and the big ones will bully the small ones.

Transport is the next risk. Keep the journey short, use clean water with plenty of oxygen in the bag, and avoid heat. When you arrive, float the sealed bag in the pond for 15 to 20 minutes so the temperature evens out. Then open it and add a little pond water to the bag every few minutes before releasing the fish. Watch them for the first hour. Fish that are still gasping or lying on their sides need immediate attention, and your fisheries officer can advise.

Stocking rates, and why less works at first

Stocking rate is where most first-time keepers go wrong. The temptation is to stock as many fish as the pond can hold on paper, but the water has to carry the fish through their whole growing period. Many small pond keepers who feed their fish stock in the range of about one to three fingerlings per square metre, and they lower that number when the water starts to suffer. Tanks with strong aeration and regular water exchange can carry more fish per cubic metre, but the same rule applies: stock what the water can carry, not what the tank can hold.

Start at the lower end. A pond with fewer fish grows them larger, uses less feed for each kilogram gained, and gives you a margin when something goes wrong. You can always add a second batch after the first cycle, once you know how your water behaves. Keep a simple count of what you stocked, and note any losses, so that the next cycle starts from facts rather than guesses.

Feeding: what goes in and how much

Feed is usually the biggest running cost of a tilapia pond, so it is worth getting the routine right. Use a pellet sized for the fish in the pond, with a higher protein level for young fish and a lower level for grow-out. Feeds for young fish often sit around 30 to 35 per cent protein, and grow-out feeds commonly fall to about 25 to 30 per cent. Check the label and the mill's advice rather than relying on a number from a neighbour.

Feed twice a day at the same times, and give only what the fish clear within about 10 to 15 minutes. As a starting point, many keepers feed young fish at around 3 to 5 per cent of their body weight each day and reduce the amount as the fish grow and the water cools. Weigh a sample of fish every two to four weeks to adjust the amounts. Uneaten feed on the bottom rots and feeds ammonia, so cut back at the first sign of leftovers. Our poultry feed calculator is built for chickens, not fish, but it follows the same habit of tracking how much feed goes in against what comes out.

Using manure without fouling the water

Many small farmers keep chickens beside their pond, and chicken manure is a useful fertiliser for fish. Applied in small, regular amounts, it feeds the natural plankton that tilapia graze on, giving the pond its green colour. Applied in large heaps, it rots, uses up oxygen and drives ammonia up quickly. Dried manure is easier to handle than fresh, and some keepers put it in a mesh bag hung in the pond so that they can remove it when the water gets too rich.

Keep house runoff out of the pond entirely. Rain washing off a poultry yard carries manure, dirt and any droppings from sick birds into the water, which is not what you want. Our notes on poultry farming in Ghana cover how to run a house tidily, and if you are weighing up a broiler house beside the pond, the broiler profit calculator helps you see the poultry side of the figures. If you are starting that side with day-old chicks, the page sets out what we supply.

Reading the fish for early warnings

Fish are quiet about their problems until the problem is serious. Learn their normal behaviour in the first few weeks, so that you notice the change. Healthy tilapia spread out, move steadily, and come to the surface briefly for air. They feed eagerly at the set time and their colour is bright. Changes to watch for include fish that hang near the inlet or the surface, fish that refuse food, a dark or faded colour, ragged fins, and deaths that show up after a cloudy night or a heavy rain.

Walk the pond every morning and every evening if you can. Look for dead fish at the edges, where they wash up, and for fish that are swimming in circles or lying still. Note the time, the weather and the feed given. Patterns show up quickly when you write them down. If the fish are behaving oddly and the water tests look fine, ask a fish health expert or your district fisheries officer to look at the pond and the fish in person.

Common losses and how to prevent them

Most losses in a first pond come from a short list of causes. Low oxygen tops the list, especially after cloudy, rainy spells or when the pond is overstocked and overfed. Poor water quality follows close behind, and it makes fish more likely to pick up bacterial infections, which show up as ulcers, fin rot and sores. Parasites can build up in crowded ponds, and handling during netting causes skin damage that lets infections in.

Predators are a practical loss that many beginners underestimate. Birds such as herons and kingfishers will take fish from a shallow pond, and snakes and some lizards will take small fish. A fine mesh over part of the pond, or a net across a tank, stops most of this. Do not give antibiotics or other medicines to fish that you plan to eat without advice from a fish health expert or a vet, and keep a note of any treatment and the withdrawal period you were given.

Growing out and timing the harvest

Tilapia reach a useful market size in a few months when water and feed are good. Many farmers in the tropics aim for fish of around 250 to 400 grams after about five to six months, but growth slows sharply with poor water, weak feed or crowding. Weigh a sample at intervals so that you know where the crop stands, rather than guessing from the look of the pond. The sample also tells you when to reduce feed for fish that are close to harvest.

Harvest in stages if you can. Partial netting takes the larger fish first and leaves the rest to keep growing. A full harvest needs a plan for draining or seining, a clean container with some oxygen or ice, and a buyer lined up before the fish come out. Handle fish gently, keep them cool and shaded, and sell or process them quickly. Fish that sit in warm, dirty water lose quality fast, and a buyer will notice.

Keeping a simple record for the next cycle

A notebook is enough. Write down the date you stocked, the number and size of the fingerlings, the feed given each week, the sample weights, the losses and the water readings. Add a note of any unusual weather. At the end of the cycle, read the book before you plan the next one. You will see whether the stocking rate was right, whether the feeding matched the growth, and whether the losses came at a particular time of year.

Between cycles, drain the pond or tank fully, let it dry in the sun where you can, remove sludge and check the inlet and outlet screens. Repair any leaks before you refill. If you want to use lime or any other treatment on the pond bottom, ask an adviser first, because the right choice depends on your soil and water. Then stock the next cycle from the lessons of the last one, not from memory alone. Our blog has other practical notes, and our FAQ page answers common questions about the poultry side of the business. Starting prices for chicks are on our prices page.

Questions farmers ask