I have a pair of mature Bolivian Rams living in a planted 29 gallon peaceful community setup and I cannot get them to spawn. This pair has spawned successfully one time in the past raising the young for a few weeks until they were all eventually picked off by tank mates. However, since this single spawning event they have refused to replicate the act much to my dismay. I have tried heavy feedings and conditioning followed by a cool water change and increase in water temperature, re-aquascaping and keeping the water parameters in check. Currently the female is very plump and the male is also in great condition, they just don't seem to want to do the deed. There is general chasing and mild aggression with the occasional lip locking but never any damage and every now and then I see mild displaying but noting too serious. Does anyone have any ideas on what I could do to stimulate spawning between these two? I've attached a picture of the tank, you can see the two squabbling. sorry for the poor quality.
