Did I Do It Wrong?

ckulahci

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3 weeks ago I had redecorated one of my 250L with new substrate (silica sand+crushed coral: 5/3), few rocks (lava) and a few fake plants. All water parameters are in good shape.
Then I added two species, namely Kadango red borleyi and OB peacock, all from the other existing tank. With regards to the Kadango, at first the stocking and the dominance order was as below:

1m Kad. (~9cm, can't really say it has a fully developed blue on its face)
1f Kad. (~8cm)
1m Kad. (~7cm)
4f Kad. (~5-6cm)

They were doing just fine and males tend to display some will to breed even in such an early stage of the new environment.
Then after a week, I couldn't resist the idea of adding one other adult female (~10cm) to the same tank, although I was really hesitant to do so. This female in a few moments established its dominance over all the others. The larger male had a fight with it and lost decisively. Now the new female rules the tank.

Did I ruin the nice first setup? I really want to see my Kadango's breeding. Is removing that female the ultimate and only solution? Reallyy don't want to take out all the rockwork to catch that fish. Or shall I be patient this time and wait until one of the males fully develop and become superior to the female?
 
The mistake you made was adding a fish to an existing group, it's really best to add them all at once. That said, you may be able to "fix" things by rearranging all the rock work, thus breaking up existing territories and giving the male a chance to re-establish dominance. If you don't want to do that, you could just wait it out, as long as the female isn't being aggressive enough to do any real damage.
 
thanks for the advise... I guess I'll leave the tank as is. But decided to carefully increase feeding to eliminate the possibility of the reason being competition for food. Incredibly the aggression drastically reduced. Still being chased by the female but no more mortal combats... Guess things will settle over time.
 
Just a quick update:
The male started to dominate the others a week ago with all the brilliant blue on its head. The best part is now the female is holding.

PATIENCE, PATIENCE, PATIENCE... It pays off...

:rolleyes:
 

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