i used jungle start right with allantoin, but i also used tetra safe start (live bacteria), cause i really didnt have the time to let it cycle completely.
ya i know they only do it sometime but it kinda looks like there hertin themselves when they do, and i can tell they have been doing it just by lookin at them
I wouldn't worry about it too much unless you start seeing missing scales and damage. It took me a long time to get yused to how they scratch when they are growing. They eventually slow down but still do it every now and then.