I had a pair of angels and a pair of rainbows for quite awhile with no issues. Both males have died. Lately, the female rainbow has been ... well, take a look.
http://www.youtube.com/watch?v=jpFlTOlly5c&feature=youtu.be
This goes on constantly now. I don't know if it's aggression, or some kind of "mating" thing (it reminds me of how Mr. Angel would get whenever Mrs. Angel was about to lay eggs). She hasn't laid any eggs that I've seen since Mr. Angel died.
This is a 55 gal community tank, and the only other fish are 2 cories, 1 plecostomus and 3 frogs.
http://www.youtube.com/watch?v=jpFlTOlly5c&feature=youtu.be
This goes on constantly now. I don't know if it's aggression, or some kind of "mating" thing (it reminds me of how Mr. Angel would get whenever Mrs. Angel was about to lay eggs). She hasn't laid any eggs that I've seen since Mr. Angel died.
This is a 55 gal community tank, and the only other fish are 2 cories, 1 plecostomus and 3 frogs.