Guppy not getting pregnant anymore
I bought a breeding pair of Red Deltas from Aquatic Warehouse and I put them in a 3 gallon tank along with two other mixed females. From the very beginning, the male was super interested in the mixed females and didn't pay much attention to the Red Delta female. Well, anyway, she did give birth twice to roundabout 20 fry each time, but then for a month now she doesn't appear to be getting pregnant at all. The male is showing zero interest now and she is skinny (but still shows a gravid spot). The other two mixed guppies gave birth to 55 and 19 fry respectively, so clearly they're getting pregnant. What could be going on?! Here are pictures of the male and female in question. I am feeding them Tetra tropical color flakes.