Sorry for the delayed response. I'm not a legit breeder, but I just observed the frenzy of spawning on my java moss matt several times. The clean up crew ate everything before I got to it. I'd say anchor some moss to a rock or something, feed a good diet, keep clean water and wait for it to happen. my fish spawned after lights on every morning for a few weeks month after month, lol. I ended up breaking that tank down and giving them away. About to start up a 180 gallon tank with them, dwarf neons and thread-fins in it.