bextraordinary;2049239; said:To those who are seeing different growth rates: are your polypterus in the same tank? Do you feed them individuall, or just put feeders/pellets/whatnot in there and let them have at it? I'd be concerned that one fish is simply eating the "lion's share" of the food and is therefore experiencing faster growth. In any pair of fish, one will naturally be more dominant than the other... I'd make sure the results you're seeing aren't simply a matter of feeding discrepancy, and not a different in natural growth rates within a species.
I have all 4 sens in the same tank, i feed all of them at the same time and they all get enough food ( always watch them eat) I guess the smaller one is the just runt of the litter and will do some catching up later.