let me start with the first incident.
when i started my tank, (20 gallon) the
LFS told me to start with a couple of fish and grow from there. so i purchased 1 zebra danio, 1 red platy and later added the algae eater. about 6 weeks later i noticed a fry in the tank, only one. it grew up and is about half the size of its mother. 1 1/2 weeks ago i added 3 female and 1 male (platy but all different colors) and moved the danio into a seperate tank with 2 more of its kind (it was picking on the mom). Just yesterday i noticed two new fry, one red and one blue. now my question is: is it normal for the fish to have just one fry? the moms still look pregnant, but not as big as before.
