Well, after introducing myself yesterday and after perusing through this category I want your advice on whether I could get away with a tank mate for my Oscar, which is some 4 inches long so far. My tank is a 65 US gallon and I have two big HOB filters, plus a Marineland 360 canister filter. I was thinking on either a Firemouth or a Convict, or something else. I wanted it to be a cichlid.

Thank you for any advice.

I don't think I would add any more fish to your aquarium. Give it 18 months and your oscar could well be approaching 12 inches. I think you are going to be pushing it by putting any more fish in the tank, especially ones that need to get to a certain size so they do not become dinner

Thank you for the advice. That's what I thought, but I wanted to check with you guys who have a lot of experience.

Im sorry but your tank isnt big enough. Oscars get massive and if you see a full size one then you will see why your tank is only big enough for 1 oscar

Oscars get massive and if you see a full size one then you will see why your tank is only big enough for 1 oscar

with that size, i would rather enjoy one happy oscar with good
decor like driftwood and some rocks. adding one more fish and it
would be more problem later on....

Thank you all guys for the advice, which I will totally follow. I actually thought likewise after all I've been reading here but anyways wanted to check with you all. Again, thank you all.

wow
you just repeated the exact words