Rmac those kamfas will grow fast as hell, unsure about the silks but mine are hanging out and getting along with my kamfas. I had 1 of those kamfa from Julie last time I ordered but the moron jumped out of the 1" gap between my filter and my lid but he grew like 1" in the 2 weeks I had him. When the silks came out they weren't very stable, but that was about 8 months ago. I'm not worried about losing a $20 fish but if I would have paid $200 when they first came out and lost one I would have been pissed. I can'y say if they're fertile or not, only time will tell but I'd bet it will be tough to find a fertile male. Some of those red dragons are really amazing. I'm sure you saw Joe and Rob both had some little monsters with heads too. I'm hoping mine turns out the best though since he's so small and is absolute monster LOL 

