็Trick for Breeding Biotoecus opercularis

[Champ_17]

I bought group of juvenile Biotoecus (10 pcs.) and they seem very healthy fish.
I put them in to the tank that I used soil as substrate to reduce pH around 5.5 as well as I used for breeding apistogramma.
Actually I need to used sand as substrate like the Biotoecus Opercularis's Biotope but almost of sand sole in the market effect to increasing pH because it's sea sand.
and yesterday I found the shop buy river sand that i think it's not effect to increasing pH so I buy it and I need to ask some questiones
1. if i used sand as substrate how is the best way van I reduce pH?
2.To use the sand as substrate is very helpful to breeding this species.
3.How can I identify my fish what's male or female?

 

[wethumbs]

Nice pics.

1. unsure, bad angle
2. male
3. female
4. male
5. top one is female
6. middle one is female

 

[Champ_17]

Nice pics.

1. unsure, bad angle
2. male
3. female
4. male
5. top one is female
6. middle one is female

wow how can you know that please suggest me. : )

 

[Mike Wise]

Look at the green band on the base of the dorsal fin. Males show a solid line; females show a series of dots.

 

[wethumbs]

Mike, is the other way around. Mature male also has fin extensions on dorsal, ventral and anal fins.

 

[Mike Wise]

oops