Originally Posted by michaelbsc
They are the same thing. As the developer becomes depleted you pour out part and replenish it with fresh.
The problem is that this only works right if you have a high volume line running. Therefore all the confusion over the years about using the chemicals "one shot" rather than replenished.
The spreadsheet links I posted are *NOT* for replenished use.
The "starter" is what makes the "brand new" developer appear that it has been used and replenished.
Thanks for the info.