How do you deal with changes in aggression?

[reely989]

So I'm past the 2 year mark on my 300 gallon tank and it's pretty well established and stocked at this point. What I'm running into now over time are changes in who thinks they are the boss of the tank. For a long time it's been my king angel and while he's been a pain to some other fish he doesn't really do much other than chase. The last few weeks though it seems like my sailfin tang has realized he's actually bigger and badder than the angelfish and has kind of asserted himself as the head honcho in the tank. He's a little less nice than the angelfish and is absolutely terrorizing my foxface. He's camouflaged and spiked up just about all the time now. I'm gonna add some rocks and keep up some mirrors for a bit to see if it helps. Any other tricks you guys have had work for situations like this?

 

[Fish Fan]

@vetteguy53081 may have some suggestions here if he has a minute to check in

 

[mfinn]

I'm going through the same thing with tangs in my tank.
I recently lost the hippo tang who was the tank boss and kept my 3 yellow tangs in line.
Now that the hippo is gone, 2 of the yellow tangs have been going at it.
I am doing the mirror trick and have a little success.

 

[winxp_man]

Feed more times and day can help. I feed less at one setting but more times during the day.

Nori, ogo, mysis, black worms, spectrum pellets, easy reef dki pellets.

 

[vetteguy53081]

@vetteguy53081 may have some suggestions here if he has a minute to check in

Isolation in a separate tank or with divider. I currently have 2 fish in a sump for a 3 month timeout

 

[reely989]

Feed more times and day can help. I feed less at one setting but more times during the day.

Nori, ogo, mysis, black worms, spectrum pellets, easy reef dki pellets.

Think I'm gonna do this, too. I do notice that aggression tends to go down with increased feedings and my fish are all pigs so none of it ever goes to waste.

 

[winxp_man]

Think I'm gonna do this, too. I do notice that aggression tends to go down with increased feedings and my fish are all pigs so none of it ever goes to waste.

One day I decided to keep them off some food to get them to pass what they pig out on. Biggest mistake ever. I had 15 ticked off tangs wanting to kill each other in a real bad way. It didn’t help that the next day I was stuck out of town and couldn’t get food. So two days everything went ballistic. Even the angles went after each other. Never again. So I feed less but more times a day.