I bred bettas about 20 yrs ago. I had a 4ft x15"x15" community tank with 1 m/3f in, no agression problems as i had lots of hiding places for the females. Eventually i set up an 18"x12"x10" deep tank with a divider in the middle, some floating plants and a small u/g filter. Put the male in 1 side, female in the other. The male was building a bubble nest within the first 10 mins. I fed them both on bloodworm and brine shrimp(livefoods) to condition them. After about 10 days the nest was approx 8" across and maybe 2" above the water. The divider was then raised about 2" so the fish had access to each other. They were spawning within minutes. The male would display in front of the female, she would nudge his flank and then he would swim just below his nest and she would follow. He would then wrap his body around hers and sqeeze some eggs from her. You can actually see the eggs falling, they are about 1mm across and white. He then let go of her and swam down to collect the eggs, spitting them up into the nest. The first time this happened, the female just floated to the substrate, i thought he had killed her. When she hit the substrate she came round and swam away, then the process was repeated till she was empty of eggs. This took about 30 mins. He kept trying to coax her back to the nest, but she had no eggs left, so she was removed from the tank and placed in a breeder net for 2 days to recover. The male then sat below the nest fanning the eggs and picking up any that fell out. After 2 days the eggs hatched and i could see the fry tails hanging down, again the male put back any that fell out. Another 2 days and the male was removed and put back in the community tank with the other females and the 1 he had spawned with. He is best removed after 2/3 days as he will then start to look on his fry as live food. The fry were fed on newly hatched brine shrimp and infusoria. I also prepared a high protien diet for them from scraped ox liver, egg whites, a liitle amount of ox blood and egglayer fry food(this stuff really stinks after 2 days), which i kept in the fridge and fed into the grow out tank with an eye dropper. Within 12 weeks they were approx 1" long and all the males were seperated into jars which were left floating in the growout tank. females left in tank. The jars were cleaned every day and my fry grew to be beautifully finned and coloured. I never tried to spawn them again, as i only did it to see if i could. All the fry went to my lfs and i was told the males were some of the best they had ever seen. If you take your time and do it right you will have lots of pleasure breeding these, but PLEASE, watch them and remove the female as soon as she seems to have had enough or the male will kill her. Good luck in your venture.Chris.