Thanks you guys! We've been overlap setting which may be part of our problem, but 4 days after our first hatch 'J' is it's name, wehavd a sibling arrive! J was lonely and loves the newbie! We don't know for sure who J came from yet, but newbie (who my kids call Tigris) is definitely from our tetra hybrid (TSC breed). Pretty sure she's fathered by our Red Ranger given the chipmunk stripe!