Oscar and my 5 new Red Hooks are now swimming happily around in a 375 l tank!
Seems like Oscar enjoys both the company and the new tank.

A question: Is there any type of roots i shouldn't put in an Oscar tank?

And btw, anyone who can tell me anything about the Red Hooks? Can't find any information on them..

Sorry, dont know how, but I managed to post the same thread twice!

Hi Anette, I would say that the Red hook has very similar care needs as regular Silver Dollars. But are you also aware that Red Hooks grow bigger than regular SD's ? They can get to 8" But they are nice fish.

Species name: Myleus rubripinnis

Common name: Red Hook Silver Dollar

Family: Serrasalmidae

Order: Characins

Class: Actinopterygii

Maximum size: 20 cm / 8 inches

Environment: Freshwater

Origin: Guyana, Amazon

Temperament: Peaceful

They like the same kind of water parameter's as your O, so you are fine in that department. They do however need somewhere to hide or swim away to, when being chased by your Oscar, so try some of the larger plastic plants, you can use real plants, but the Red Hooks will munch on them and your Oscar will pull them up eventually.

Thanks!