well if there is a black line by the females stomach that means that she is pregnant and she could drop at any time from then i have guppies and i also sell them :D
Hi i usually leave it on all day untill night and then turn it off or i leave it on all night and leave it off in the day that way you dont burn the light out or give the fish to much brighness.
Hi, its up to you really, i usually sometimes leave the light off in the day and leave it on at night or leave it on in the day and off at night so it doesnt burn it out.