hey
JD..its ok to clean the tank..your babies will go to one side and stay there and you can clean the rest of the area...they should be old enough now to see them in the bucket....not sure what the white stuff is, a pic would be great..but im thinking its just algae and waste from not cleaning for fear of the babies getting sucked up...are your nitrates high? and remember, having to put a few back in the tank because they took a ride thru the hose, is much better then them dieing from bad water

goodluck!! you will learn to be a pro at this soon!