Yes, it is female. Nice pictures by the way!

Here he/she is:

You should put there more hiding places, small spaces between rocks. Every zebra likes to take his/hers own little space. I'd say there is now only 3 hiding places, the spawningcaves you have built. Other zebras will feel themselves very unsafe. So, add more rocks, bogwoods etc. Good luck!

I would remove the alpha and see what happens.

Two males.

Today I feed my fish and sit down to look at my baby zebras, there are two litters and they are freely raised up by their dad, and are in this same tank. Baby zebs come out from their hiding places to eat, when I noticed a light colored baby zebra. First I tought that some terrible disease has arriv...

Bottom tank
A:Young male?
B:Female
C:Female
D:Female

Top tank
A:Male
B:Male?
C:Female
D Male

It's a male.

The first one looks like a snubnose to me...

When a fish stucks in somewhere, it takes only few hours to die on stress. I lost one of my females couple of years ago, she was stucked between two rocks by her neck.

How many fishses (and the ratio of the gender) in 60 cm tank is good for
breeding?

I think it's very small tank for zebras. You can try with one pair. It is hard to keep the waterparametres good in such a small tank.

I think:

1: Male
2: Female
3: Female
4: Young female
5: Young male (or female)
6: Young male
7: Young female

The 60cm tank is too small for them. I recommend you to buy them a 110-120cm tank (about 200-250L). Good luck, you've got very beautiful fish.

Well, I changed the male an what I have now... - 7 cute little zebra babies! Seems that this younger male is a better dad than the older male. This younger male kicked out tree babies, but I collected them in to an empty cave and putted cave in to a net. One baby died on fungus next day, but then I ...

You should feed them also with bloodworms and dry (flake) food. Hart is very rich in protein and should not be fed too often. From pleco pellets your zebras get vitamins. Buy only small amounts at time, cause the vitamins don't last long on dry food. -Buy high quality dry foods from special stores.

I must add my pic of a pair of L 174:



Quess which is which? (Well, they haven't ever spawned, but the ladies are really fat!)