So the Grays are 2 months old and around 1 1/4" snout to vent. I've just been feeding FF, but I know they need variety. I've been a little stymied about what size crix to get at this point. Would 1/4 be too large? As much as I watch these guys, it's hard to tell just how big their mouths are (I'm AWFUL at sight measuring). What say you?

About the calcium: the directions say not more than 2x per week, but these are juveniles, and I don't want to poison them or harm them in any way. How often should food be dusted with Ca?