buttikoferi's lost colour?

[butters]

our three buttikoferi's have lost there colour and look plain and washed out. has anyone had this happen? they are healthy otherwise eating heaps etc.they are in a 180g alone,waters fine weekly water changes???

 

[bigspizz]

Yes...Mine did this often....He held bold stripes for the most part, but would go through major color changes often...Post some pics

 

[Thefishfrog]

Mine lose there color when they get stressed (usually during water changes) or when they are fighting but thats usually it