Tank setup Guide for Breeding
As Tetra fish are found in warm climate, so when they are kept in an aquarium, the water temperature must be maintained between 23-26 degrees Celsius or 68-78 degrees Fahrenheit. So, you will not be able to provide a suitable aquarium without a heater and thermometer to regulate and monitor water temperature.
Tetras will stay healthy in marginally acidic water. They can tolerate pH between 6-7.5, but the optimum pH for the aquarium is 6.8.
The natural habitat of these brilliantly colored fish, have shady locations and dense vegetation, so they virtually live in shades. If they are exposed to bright light, they may stress out and behave abnormally. So to keep their sanity intact and let them remain stress-free, the aquarium should be decorated with plants, marshy branches and driftwood so that they can enjoy environment similar to their homes in river by hiding in such dark places. The airline tubing should be connected from the air pump located in the aquarium, to any air outlet.
The aquarium should be properly cleaned So that it is clear of biomass or tiny organic particles. The water should not smell foul and clean the tank without using any chemicals, preferably with hot water.
Breeding Behavior and Pairing
In the wild rivers, tetras breed in the rainy season when the weather is wet with the consistent rainfall, but when they adapt themselves in an aquarium, they can multiply throughout the year due to controlled temperature and moisture conditions. Some species of female Tetras become active for reproduction at the age of 9-12 months. But in some larger species, the active age of breeding starts between 1.5 to 2 years.
To get success in breeding tetras, separate male and female Tetras must be kept in the same tank but in separate sections created by a clear partition between them for about two to three weeks, so that they can see their partners and get ready for the future mating and subsequent parenthood. You can differentiate between male and female tetras by their physical appearance. Males are usually slimmer and more colorful than females and females are plumper and rounder because of the build-up of eggs in their body.
Spawning and taking care of eggs
When the Tetra are ready to spawn, you must prepare another tank with clean and aged water, live plants and a peat filter. The female must be placed in the breeding tank a night before breeding and then add the male after the female.
After you add Male, a very important thing for a breeder is to watch the behavior of male Tetra. Males often show aggressive behavior by attacking females. In such situation the female must be shifted back to its section in the tank. This will help the male in controlling his aggression and accept his partner next time. Two to three females can be placed in the tank so that the male Tetra do not have to focus on one female. To give an environment for breeding similar to the wild, the tank must be covered with some hard board with a window to provide a little light and little visibility.
When the male Tetra fertilizes the eggs it must be removed from the breeding tank immediately, to prevent him from attacking the pregnant tetra or the eggs. The eggs will hatch within 24 hours’ duration. The young Tetra are very small in size just about a centimeter so they must be fed something that they can ingest without any difficulty. Infusoria can be offered to them for the first few days. Once they grow a bit they can be fed baby brine shrimp but you can also buy some commercial fry products for better care, since they are hygienic and are convenient to serve.