Have no idea on gender.
At first I put them all together in one tank and had some spawnings. Then I split them to two tans. Both groups spawn succesfully.
T: 28-30 C
TDS: 50-100
Tanks size: first 60X80X25h, second 120X80X30h.
I'm feeding them with Pleco ceramics food.
The size of the biggest male is up to 4,5 cm TL
Eggs:
Fry: