[missmary]

I have a 180 gallon aquarium and intentions to transfer 2 8"+ oscars and half a dozen blood parrots (2 of them are around 5-6", the other two 2-3") into it. It's been cycled with filter media from their currernt tank. The oscars and parrots have always gotten along, even when I had added the smallest 4 parrots (oscars payed them no mind, largest parrot chased them for a bit but now swims right along with them).

I am also adopting a 3rd oscar from a friend. It's around the same size as my current 2, maybe just a tad bigger.

The final addition I am hoping to make to the tank is an 8" red devil. It is rather aggressive and is currently in its own aquarium. I was hoping to be able to move all of these fish into the 180 gallon (or at least the oscars and rd).

Anyone have any tips about introducing these fish to the new aquarium with the possibility of them coexisting without tank dividers?

 

[BlackShark11k]

Hmmm. So the planned mix is:

x6 BPs
x3 Oscars
x1 Red devil

This mix would be kinda risky. The best way to do this would be to raise the RD with them, but right now it's almost to late. It depends on the temperament of the RD and the oscars and the bp. The RD will likely beat up the parrots to death, then maybe go for the oscars. You try some other tricks like a bare tank, full tank, or whatever, but I think your best best bet is to keep the RD out.

BTW, do you know what sex the RD is?

 

[Nathan43]

It depends on the RD for sure. If it was half that size, I would say its very doable but already being evenly sized with the oscars, it could be a serious problem, especially if its a male...