All four of my synos are around 3-4" each...and yes, Mr. Polit changes from blue to bright white, just like that....also the black head goes on and off...
Here are a couple pics of the fish in the 50....I think frontosa are pretty much the only fish I have that I can take close-up pictures of w/o using flash...lazy bums!
This is one of the 4 that I kept...along with the zoomer behind....go figure, the day after I take my male 6 bar back to the store, that the females would start dropping eggs...not like it would have been successful anyway Egg eaters!!!