I will be upgrading my Rio Nanay angelfish to a 125 gallon tall aquarium. I currently have four and was wondering if I could add an Altum to the group. The Altum I am looking to get is currently housed at the seller's place with domestic angels. It seems happy with them but I figured I'd ask first, my other option is red shoulder but my preference is Altum. I don't want to get it and it's unhappy without others. It has been acclimated to Edmonton tap water