Well, we find that the best time would be when the fry has started to flare. Give it a good couple of days separation and let them flare, then you'll know which ones you'd like to keep as your breeders. This happens usually around the age of 2 months old, sometimes earlier at 1.5 month but could be as late as 2.5 months. By the age of 3 or 4 months you should know clearly whether your choice was correct :)
This approach of choosing breeders leads to some of the very best and largest of your batch being chosen. Sometimes, although very rarely, you may want to choose smaller fish as your breeders. For instance, we currently have a very nice OHM female and she's definitely a breeder with no doubt despite her size is still smaller than her siblings. Yet, we also have her largest sibling male as breeder since he has all the quality that we are looking forward to.
There are times when you have all-same-quality batch of bettas where every fish is quite similar in quality to every other in the tank. If that's the case, then you don't need to be picky. Any of them is good for your breeding.
Quality of breeders that should be showing when your fish is about 2 months old in HM:
- all fins (caudal, dorsal, and anal) have to be as long and as large as possible.
- vigor - your fish should be active and agressive
- when you've got that 'spark' in your heart whenever you see them
Update 07/09:
Some pix, all will be 2 months old next week. The red boy is a good breeder ;)
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