Breeding Corydoras davidsandsi
 Breeding Corydoras davidsandsi


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Breeding Corydoras davidsandsi

Corydoras davidsandsi lives in the middle stretches of Rio Negro in Brazil. This species is sometimes mistaken for Corydoras metae since they sport similar colorations, but Corydoras metae is native to Colombia, not Brazil. Separating these two species is actually quite easy if you take a closer look. Corydoras davidsandsi have a more elongated snout and the distinctive black stripe continues all the way to the bottom lobe of the caudal fin. If the black strip ends short of the caudal peduncle you are instead looking at a Corydoras metae.

Triggering Corydoras davidsandsi to breed

To begin with, your Corydoras davidsandsi must naturally be given a good environment. They prefer a well cycled aquarium and with a lots of plants, such as Java moss and Java fern.

Feeding your fish a meaty diet is an important aspect of triggering Corydoras davidsandsi to breed and you can for instance offer them bloodworm, white worm and daphnia. Ideally combine this with high-quality prepared food, e.g. flake food or catfish tablets.

As with most Corydoras, changes in water temperature and chemistry is known to trigger spawning, so when your fish are healthy and well fed it is time to carry out 50% water changes twice a week. Use water that is significantly cooler than the water in the aquarium. Corydoras davidsandsi is known to have successfully spawned in really soft water with a slightly acidic pH-value (pH 6.5-6.8), but whether or not this is ideal conditions is not yet known.

Sometimes Corydoras davidsandsi need a really large push to start breeding. If you have tried the suggestions above to no avail, you can retort to performing a 75% water change with cool water, adding vigorous aeration and give your fish huge quantities of meaty food.

Corydoras davidsandsi spawning

During spawning, the dominant male will chase the female around before they position themselves in the classic Corydoras “T position”. The male will use his pectoral fins to grab the female at the barbells, and this can unfortunately cause some damage. The male will push the female really hard and she will break away from him within 10 seconds. The female will then start releasing her eggs into her ventral fins. The male will continue to chase after her as she swims around in search of suitable spawning sites. Plant leaves as well as aquarium glass can be chosen. During the first spawning, it is normal for the female to produce a very small amount of eggs. The couple can continue to spawn once a week and the following batches will normally be bigger than the first one.

Corydoras davidsandsi eggs

Most Corydoras davidsandsi breeders chose to move the eggs to a fry rearing aquarium to safeguard them from hungry adult fish. The fry rearing aquarium should have sufficient aeration to prevent fungi attacks. You can also at methylene blue to the water to decrease the risk of fungi problems. Unfertilized eggs must be removed as soon as you spot them.

Corydoras davidsandsi fry

The eggs will normally hatch after three days and the fry will feed from their yolk sac during the initial 48 hours. Microworms and liquid egglayer fry food are suitable as first foods. When the fry are around two weeks of age, you can start feeding the crushed flake food and brine shrimps.  

Large and frequent water changes are really important when breeding Corydoras davidsandsi. During the first few weeks, up to 50% of the water should be changed each day. It is however important not to shock the fry with rapid changes in water quality, temperature etcetera.

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Breeding Corydoras davidsandsi