So it is my understanding that with benzotriazole as a restrainer, its concentration in the pan will decrease with each processed print? Is this correct?

I use it in lith instead of KBr, on the assumption that if I dump and replace half the contents of the tray, then I will have dumped half the amount of bzt I had in there. If the developer was to my liking, I know how much bzt to replace. Br- levels are always increasing, so I have no way of knowing how much to replace.

If bzt levels decrease with use, I guess I have been chasing my tail and gotten lucky from time to time. Is my thinking correct here?