Never had this happen before

[LizStreithorst]

My 40 wigglers decided to free swim just before lights out.  My fish always wait until it's daytime.  And these guys are free swimming with a vengeance.  Ain't no sticking their heads back on the cone.  It's a small spawn and the pair can do no wrong so I won't worry.

[Mugwump]

LOL..they're on 'Mother Nature's' schedule....I've had em free swim about every period of the day you can think of...Spawning too...anytime....I have one pair that likes the lights out...only a dim glow in the fish room....their fry go free swimming usually late evening too....water parameters can play a role here too....if the water is too cool, it's takes them longer...if warmer, they likely follow the 'norm'...48 hrs to wigglers and free swim about day five....