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I have had few spawns with my zebs, in 128L tank then I moved fishes in bigger tank 450L with good filtration. In bigger tan zebs only like fight with others and they kill few litlle males.

Now when I thinkin to sell bigger tank away and have put some of my zebs in smaller tanks the alfa male has taken action again and have got fiance in his cave. They have been in smaller tank about 3 days.

hara,
if it's not broken don't fix it, if you want to move some of the fish move only the fish that are not involved in the breeding process and when you do this make sure that you have enough fry from the group before you start experimenting on different methods a few fish breeding is better than no fish breeding, once you have attained your desired number of fry then you can play around and see what is the best way to maximised production not to mention ease of maintenance. good luck