Has anyone experience baby indo datnoid rubbing against gravels every now and then? My Jardini, Redtail Giant, Ntt Datnoid, and Prochilodus doens't do that only some of the baby indo datnoid does it. Can anyone tell me whats going on here? I have a Rena Xp3 and an aquaclear 110 for the tank and still i don't know why the baby indo datnoid rubs themselves against the gravels, the fishes are eating just fine.