Sometimes I'm stupid, the developer obviously.
Originally Posted by Matthew Gorringe
Buffering increases capacity, but citric acid is inexpensive and you can replace the bath easily.
Originally Posted by Steve Goldstein
The 15 g/l is used because more might be too acidic and less would be less acidic and have less capacity. As noted, carryover of sodium salts from the developer would tend to raise pH and buffer the stop, so replenishment with more fresh stop would be quite effective for a while.
Without a pH meter or pH paper strips, I would not suggest experimentation. Just use the recommended formula.
Two simple queries:
(1) Is the 15% citric acid, mentioned in the KB-8 formula, refers to monohydrous or anhydrous form?
(2) I just bought a 20 grams vial of monohydrate citric acid for 20 BDT (=~ 15 Pence) from the local shop (from the food section). Is the conversion rate: anhydrous = 1.17*monohydrous (=> 17% more)?