How long does it normally take for acei fry to start showing the nice bluish color. I have a batch of about 8 from a females first hold and they are still tiny and showing the yellow on the fins already but they seem to sometimes have a blue color and sometimes appear really dark. Some of them even appear to go through periods of time where they look really light colored, it seems to change all the time. The parents of these little guys are simply stunning in my opinion, this is just the first time I have had fry from any of them and was a little curious. Thanks for any input.