I cichlids will change color especially when they are angry. Case in
point. I have jack dempseys,firemouths and convicts. The jacks more
than the others will get mad and change to a dark blue/black color.
Convicts when they feel their area has been violated will turn deep
black. My pink convicts will show a pale stripes when they are angry.
Just watch them for a while and see why they change. It probably is a
--- In UniQuaria@yahoogroups.com, "cyucel" <cyucel@y...> wrote:
> Here is a strange story I could not find any explanation.
> The setup is 3 Malawi Cichlids (Electric Blue - Ahli type) on the
> later stages of Nitrogen cycle. All chems. are in acceptable levels.
> On night, when I came to home at dark, I found all of the three
> the bottom seem like sleeping but also a bit ill. The strange thing
> is that, the blue one (male) was about black and seem to be cannot
> move, open, close his fins ! The female (pink) one has her whiteish
> lines turn to dark brown-black. Even the white-yellow part around
> their iris was black. (Here I don't mean dark, they were BLACK)...
> After watching their little paralised movements a bit, I concluded
> on Nitrite poisoning (it was above 0.5mg/L) and start to perform a %
> 40-50 water change. When I was just siphoning water from the
> they suddenly turn back to their normal colors ??? Blue one get
> little longer to recover (about 30 mins). (This made me think that
> there could be excessive nitrite levels at the bottom but I could
> not confirm this on later measurements). Every thing was fine
> Last night, the same happen again, instant Nitrite measurement
> showed between 0.3-0.4 mg/L. This time, I wait a bit. And they
> slowly turn to normal colors in time.
> What is that ? Do this guys get black when sleeping ? Or do they
> more effected by the Nitrite due to slow respiration during sleep ?
> Or what ?
> That was not enough, the same time, last night, after they get
> normal colors after 30-40 mins, I made a %20 water change. Just
> during the water change, something incredible happen, the dark blue
> male turn to a pink-whiteish color !!! He was almost impossible to
> distinguish form the female ones. He was the same in the morning
> until I turn their light on and he became blue in a few seconds !!!
> I know that this is not lighting, not my eyes or some other
> observational problem. They are really changing color somehow fast.
> Thanks in advance for any explanation or suggestion that you may
> Kind Regards.