A guy one told me a long time ago wen you do a water change do it with cooler water I used to do that with my green terror and they would breed every time afterFrom what I have read, they reach sexual maturity at 6 months of age. Thats what the internet says so take it with a grain of salt I guess. I have my own JD breeding project going on as well, no luck so far but they just hit the 6 months of age mark so we will see.
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They do all the things a mated pair do, flashing chasing each other and all that just no eggs yet.