Angelfish Experts Help Pls

[evemcc]

Angelfish disputes pls help...

Hello I have had six angelfish in a rio 300 for about 18 months, one pair have been spawning in that tank for about 6 months no problems....but I turned the temp down to stop them spawning. About a week ago i did a large water change due to missing one, since another pair seemed to have formed and were acting like they were going to spawn but that male and the male from the other pairing have starting becoming very agressive, lip sucking (behavior they have never shown before and charging
So the new pair I separated into a new tank, NOW the male in the rio has started fighting with another angel in the tank....... I don't know what to do now I was told when I got angel to get six to disperse the aggression what should I do now I don't have another tank.......??
 Pls help the two that are now being aggressive seem the have white patches forming on there lips???
Any angel experts out there?

 

[techen]

300L with 6 angels is overstocked.
 
You have two pairs it sounds like, They'll fight each other to the death until you remove one of the pairs. Angels should be kept in 2's. But you're pushing it with two pairs as well.
 
So I suggest rehoming 4 and keeping the proven pair.

 

[BerryAttack]

angel's think that the whole tank belongs to them, and each angel should have 30+ gallons per angel for proper growth. 
 
you'll need to rehome the angels that have not paired, or move already paired angels into separate tank, but they are community fish so other fish will need to be put with them for a more natural and homey feeling is in new tank.
so in the end start setting up more tanks or rehome them