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One of the smallest and different corydoras. They have a very different body shape to what are normally classified as corydoras. They will spend a lot of their time in the mid section of the tank rather than the normal bottom living behaviour of corydoras..
Fish information (behaviour and breeding):
A peaceful fish. They are very small so do choose their tank mates carefully to ensure they do not end up as a meal.
The best conditions for spawning success are neutral to slightly acidic with soft to medium water. Always ensure that your water conditions are optimum.
Before breeding, the fish will need to be conditioned on a good and varied diet. High quality sinking pellets combined with a feed of live or frozen food every day is very good and in particular corydoras love frozen bloodworm. Other frozen foods can include, brineshrimp(this is good live as well), daphnia, and white worm.There is always great argument as to how many males and females you should have in the tank. In general it makes sense to have at least two males per female.
When in condition and ready to spawn the female will look very rounded and will be full of roe. Your attention should then focus on how to trigger them into spawning. The following methods can be applied to most corydoras and if they fail initially, usually the answer is persistence and to keep repeating the process.The main trigger used by breeders of these fish is a large water change with the introduction of much cooler water that brings the overall tank temperature down by a few degrees.. This is so as to make the fish believe that the rainy season has arrived and a time of plenty is upon them! You may find that initially this does not work, but if carried out every two days or so it may well have the desired effect. Additional aeration in the tank may also spur them on to spawn and the best way of doing this is to include an airstone..
Corydoras pygmaeus seem to be okay when left with the young, but to be on the safe side, If you are successful and the fish spawn, transfer the eggs to a separate container/tank which has an air stone int it. It is always a good idea to add a few drops of methylene blue( a lower dosage than recommended is usually sufficent) which will help to protect the eggs from fungus. Once the eggs hatch it will be two to three days before they have absorbed their yolk sac at which point they will become free swimming. From then they can be fed a variety of fry foods including infusoria, baby brine shrimp and microworms. Regular water changes at this time are important to maintain optimum growing conditions for your new arrivals.
|Temperature||Corydoras will happily live in temperatures ranging between 22-27C|
|Size||Approx 2.5cm, the male is slightly smaller.|
|Water Parameters||Water conditions are not critical although it is best to avoid extremes.|
|Water PH||Slightly acid to neutral|