Natrepel is an oil-based product with strong natural antioxidant properties, giving it excellent shelf stability. Correct storage is curcial, so keep the lid tightly sealed to minimise oxidation and the contents kept free from contamination. Natrepel will maintain its performance very well, but for best results, we recommend using Natrepel within 12 months of opening.

Natrepel is a fusion of oil extracts, it can therefore be safely used in PVA bags.

Natrepel’s garlic compounds repel carp lice year-round. However, in cold water fish feed very little and their digestive enzymes work inefficiently, meaning the nutritional benefits are poorly utilised. In winter, treated pellets can also leach before being eaten, making Natrepel an expensive feed additive.

Natrepel is most effective from spring onwards, when juvenile lice emerge, fish activity increases, and natural immune responses are under the greatest pressure. It remains highly effective through summer and autumn, when fish are feeding actively and able to fully utilise its nutritional and lice-repelling benefits.

The key lice-repelling compounds in Natrepel are volatile and begin to dissipate when exposed to air, reducing potency over time. This is why Natrepel is supplied as a cold oil infusion, supplied in an airtight container, to protect and preserve these active compounds.

For best results, feeds should be treated 6–24 hours before use. This allows sufficient time for the oil to fully absorb into the pellets, while minimising loss of the garlic compounds that make Natrepel effective.