Pond Health · 3 min read
Probiotics in Aquaculture: What They Are and How to Use Them
A plain guide to pond probiotics: what they are, what they are used for on fish farms, and how to choose and apply them sensibly.
Probiotics are now widely used on Indian fish farms, and the claims made for them can be confusing. This guide explains in plain terms what probiotics are, how farmers use them, and how to get the best from them as one part of good pond management rather than as a magic fix.
What probiotics are
In aquaculture, probiotics are products containing live, beneficial microorganisms, most often bacteria such as Bacillus species, that are added to the pond water or mixed with feed. Pond soil and water already hold huge numbers of bacteria. Probiotics aim to add more of the useful kinds, which help break down organic matter and waste.
They are not medicines. They do not replace a diagnosis, and they are not a substitute for good water, sensible stocking and careful feeding.
How farmers use them in the pond
The most common use is to help manage pond water and the pond bottom. Waste from fish and uneaten feed settles on the bottom and breaks down. Useful bacteria help this process along, which supports the natural cycle that turns ammonia into less harmful forms.
Farmers typically use pond probiotics during pond preparation, through the culture period as part of routine water management, and when sludge is building up on the bottom. They work best alongside regular water testing, good aeration and not overfeeding, not instead of them.
Probiotics with feed
Some products are designed to be mixed with feed. Farmers use them as part of looking after the fish's digestion alongside a balanced diet. Results on any one farm depend on many things, including the product, the water, the temperature and the way the fish are fed, so judge them on your own records over a cycle rather than on promises.
Choosing and applying a probiotic
Read the label. It should tell you which microorganisms the product contains, how much, how to store it, the dose for your pond area or volume, and the expiry date. Spore-forming bacteria such as Bacillus tend to survive storage and handling better than many other types. Buy from a supplier you trust and store the product as the label says, away from heat and sun.
Use the dose and method on the label for your pond size; our pond calculator can work out the area and volume. Probiotics are live bacteria, so do not apply them at the same time as disinfectants, lime or other chemicals that can kill them; leave a gap as the label advises. Most need oxygen to work well, so keep the aerators running after application.
What probiotics will not do
No probiotic can make up for an overcrowded pond, low oxygen or heavy overfeeding, and none should be relied on to deal with sick fish. If fish are unwell, contact your district fisheries officer or an aquatic animal health laboratory for a proper diagnosis before treating anything.
Used sensibly, as one tool among good pond-management habits, probiotics can be a useful part of keeping pond water in good order. The Zoventa team can help you choose a product for your pond and explain how to apply it.