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I started with a dozen of these fish...and had them separated into two large tanks. They were getting pretty big and started to show signs of aggression. I've been told that they can be homicidal to con specific fish. I've seen this with other paratheraps species. SO last week I split the group up again into a third tank...with four fish in each. Yesterday I noticed that in one tank the large male was ramping up the beatings on a smaller male...a sign that he was beginning the bonding with one of the females in the tank. I removed the smaller male to a fourth tank.

This fish was extremely colorful at a small size (4"). The male that is beginning to bond is...if possible...even more colorful now.









You can just make out the female in the background. BIG difference in color now between the sexes.



Better for comparison...

.......amazing colours, what the maximun size that they can get?

10-12"

In just fifteen days have been a remarkable change, I'm glad they grow so fast.
By the way, I noticed that you only have a sponge filter in the aquarium. Is that the filtering method you usually use in your aquarium?, what is the frequency of water changes you do?.

En solo quince días han tenido un cambio notable, me alegro de que vayan creciendo tan rápido.
Por cierto, he observado que solo tienes un filtro de esponja en ese acuario. ¿Es ese el método de filtración que usas normalmente en tus acuarios?, ¿cual es la frecuencia de cambios de agua que realizas?.

I also have a magnum 350 filter with bio-wheels. All of my tanks get a 30-60% water change every seven days.

También tengo una magnum 350 filtro con bio-ruedas. Todos mis tanques de obtener un 30-60% del agua cambia cada siete días.

Thanks for the explanation.
I imagined that it would not be the only method of filtration of your aquarium, especially with those species that make the water gets dirty quickly.

Gracias por la explicación.
Imaginaba que no sería el único método de filtración de tus acuarios, especialmente con esas especies que hacen que el agua se ensucie rápidamente.

Big and frequent water changes are the key to healthy fish.

Grandes y frecuentes cambios de agua son la clave para peces sanos.