Would all these guys get along in a 125 or will I need to work up higher than that?
Yeah agreed. If you had maybe a 300+ tank you could do more. But as Deadeye said, 125 would be better for just one Oscar and maybe a few smaller fish.In a 125 the Oscar really should be the only large cichlid. Anything else should just be dithers.
They are only juveniles right now - once larger the fights will get much more rough.
I’ve seen GT with likes of frontosa aswell as Oscar’s and pacu. I was more worried hearing they get bullied easily! But for more peaceful fish like frontoss (probably due to their size though) I feel as though growing together and then moving to a bigger environment won’t create too many problems. Of course problems can be expected with many different cichlid types but I’m prepared to make the decisions and sacrifices needed if the time comes for them. Always in the fish interest over mine!Gt really isn’t a great tankmate for either - they are quite belligerent compared to the other two.
Is this due to personality or size? Because if size idk considering I can see other tank with 3-4 Oscar’s in a 140-180?Um...A GT and an Oscar won't fit together long-term in any tanks you have right now...even with powerful filtration. You would now need something probably twice the size of the 150 long-term, honestly.