Altum with Scalare

[Toothy]

Setting up my new tank (180 gallon) and want to have angelfish as my main display fish. Would an ultum angle get along okay with a group of saclares?

 

[A201]

IMO, The combination would be a toss up. Really no way to predict.
It's not uncommon for Angel's to display aggression. It's been my experience that Angel aggression isn't pleasant to watch, but usually not much substantial damage occurs.
A spacious180 gallon tank should significantly lessen the chances of damaging aggression issues.

 

[MacZ]

Aggression aside, just because of the chance of hybridisation I would not mix them. Nobody knows how the import situation for true Altums will develop in the next few years and it would be a shame if the captive stock is diluted with P. scalare everywhere.

 

[Toothy]

Not planning to raise fry, more of a community (Angels + dither) but will have some expensive koi angels so don't think I'll take the chance.

 

[MacZ]

In that case keeping them separate is defintely the best option, yes.