its all down to factors involved.

e.g say you take my dye and go nuts with a Purple colour and stick loads in then your system is running hot it wont take long before it stains every thing (cannot give a time scale).

This is the same with any colour you put in your system. If you running Clear blue it wont stain for a very long time.

If running UV green/yellow again it wont stain as much as these dyes are not as dark as others.

Like i say ALL dyes stain there is no avoidance on that and if a dye maker says they don't then they are lying because they don't know what else you are running in your system with it or if you running mixed metals or some sort of wired tubing.

I cannot give a time scale because i don't know how many drops you have in or your bioside ect ect ect.

If how every you regular clean you system then you wont have any problems to be honest. (but not many people do that they expect miracles to happen lol)

God im so honest at times.