My pregnant guppy is pooping yellow then black then yellow poo is this normal ? Is it a sign she gonna give birth?
this is normal you probably feed flake food and this do often have multiple colors,this is a trick the producer uses to make you buy it so it is not different content in the flake food it is the same content in the food only the coloring differs.
the coloring is useless for the fish and is not absorbed by the fish so it passes into the poop.
when the spot around the anal area of your guppy is allmost black your guppy is ready to give birth but be patient it can still take some time before the fish gives birth maby several days(this is one of the things we have no controll over).