beak rot ? need help

[enchilada]

Hi
I have this DBT for a while . He is super active and eats like pig .
Recent I noticed a litttle hole in the beak （may 17th)



And today the whole tip of bottom beak is missing （May 21 )

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He still eats like pig , no sign of skin rot or she'll rot .
Is this something I should worry ? If so , how to treat ?

Thank you

 

[wellington]

Does he live with anyone else? Post a pic of his tank/pond. @Anthony P might be able to help

 

[enchilada]

he lives with 2 other smaller DBTS, he is the largest

 

[Anthony P]

Do you have salt in the water?

This doesn't look like mouth rot. More likely, to me, the damage may have been done by biting down on something. Tough to tell for sure.

 

[enchilada]

Do you have salt in the water?

This doesn't look like mouth rot. More likely, to me, the damage may have been done by biting down on something. Tough to tell for sure.

no salt . fresh water

right now im using this :

as far as i know, it works pretty good on skin infection

 

[cdmay]

Some salt in the water would be helpful but I also agree with Anthony---it appears to be an injury of some sort. Either from one of the tank-mates grabbing at the same food item, or by the turtle in question biting something.