I would recommend keeping the angels separate from the Discus
, as I'll explain momentarily. Do you have suitable accommodation for the angels on their own? As they are presumably used to each other, it would probably be unwise to add other angels, even though this beautiful fish should always be in a group of 5 or more (except spawning pairs), as is explained in our profile, Pterophyllum scalare
[click on the shaded name to see the profile]. Circumstances sometimes dictate "un-normal" situations, and this may be one such case.
This fish reaches 6 inches in length, and up to 8 or more inches in height (fin span), so it needs "room" as you probably know. A 3-foot in length tank with the two angels and some "dither" fish to provide more security, plants and branches, would not only be a beautiful display but would almost guarantee their good health.
On the Discus
/angelfish issue. Many do keep these fish together, but it is not advisable. The disease issue mentioned is not the reason; the inherent nature of the two species is. Jack Wattley who certainly knows about Discus
has often remarked that they should not be combined with angelfish. Angelfish are much more aggressive at feeding than Discus
, and Discus
may become intimidated by this, and not eat sufficiently even to the point of refusing to eat at all. I would not mix them if it can be avoided.