I have been keeping Convict Cichlids with Oscars for a few months now, with mixed results.

A breeding pair of Convicts is already settled in there. I added another pair yesterday since they reached 2+" size (The Oscars "vanished" a 1.5" Convict and threatened to have a snack with another young one the same day I place him in the tank, the female survived).

If Convicts grow up to 6" why aren't they listed as compatible tankmates with Oscars? I have no doubt they would eat young Convicts, but so far mine seem to tolerate -without showing interest in eating/harassing- the sub-adults and adults Convicts.

Pepe
Santo Domingo

Most people dont put convicts down as tankmates for oscars because they can be so aggressive. From my experience one convict is fine as a tankmate for an oscars. A breeding pair of convicts can be a nightmare

I just bought a convict today which is about one and a half inch in size, my biggest Oscar is around 7 to 8" and so far he has shown very little interest in it, do you think that it should be alright?

Even though I waited mine to be 2+ inches long, at 1.5 yours may be safe. Make sure you provide safe cover (decor-cave) and watch for the Oscar behavior. If your Convict is ignored, I would expect things to go well for you.

Pepe
Santo Domingo

I have some large pieces of bog wood placed so that it makes like a cave area that the convict can get into, while I have been watching them the convict keeps swimming up to the biggest Oscar and every now and then he gives a little Chase but stops almost straight away so I am optimistic

Hopefully we succeed in our attempts.

No one's been harmed so far in my tank.

I guess as long as we provide enough space and good hiding places this combination is safe.

My four Convicts are paired-off, spawn, and raise their fry until they're eaten by others; then again they eat other's fry too (e.g. Oscars) so I guess it's a so far so good situation. And they eat food particles that come out of the Oscars gills so they help keeping the tank clean.

Pepe
Santo Domingo