Looking for some feedback from experienced Altum keepers. I may have an opportunity to purchase some young Altums, imported from Colombia (first time in many many years they have been available in NZ). I'm fairly experienced, but have never kept fresh wild-caught fish nor Altum Angels. I'm aware of the special treatment they require as young, but what I'm wondering is how they will work in my tank once they've grown up a bit. My tank is about 2000L, 240x120x70cm, filtered with big sump with Seachem Pond Matrix, Poret Foam, and Pothos plants which keep the nitrates below 10ppm. My tap water is straight rain water collected off our roof, TDS <10ppm, no hardness. Tank usually sits around pH 6.5-7, TDS 40-60ppm and minimal hardness, and that is with a basket of lime chip sitting in the sump which could be reduced/removed. Current stock is; 11 G. altifrons (9 young and 2 old), 6 Uaru amphiacanthoides, 6 P. scalare, 4 M. festivus, 20-30 lemon tetra, 4 large P. nigrolineatus L190, and 7 B. xanthellus L18.
I was thinking of adding larger group of P. scalare 'Peru Altum', but the owner of the LFS gave me a heads up that the young Colombian Altums are in quarantine now and it's got me thinking! How do the altums get along with other medium-large cichlids like Geophagus and Uaru in larger aquaria?

I was thinking of adding larger group of P. scalare 'Peru Altum', but the owner of the LFS gave me a heads up that the young Colombian Altums are in quarantine now and it's got me thinking! How do the altums get along with other medium-large cichlids like Geophagus and Uaru in larger aquaria?
