I recently moved the 6 of them into the 90 with 3 breeding pairs of cutteri, REALLY didn't want 500 fry. From what I've read about their adult size I presume they're big enough to spawn now. I had been feeding them endler's regularly before I moved them into a 55 to pick off the excessive brown BN fry. With all the live fish in their diet to supplement the NLS pellets I'd think they should be spawning soon.