More info
Tap Water is fine.
It is less contrasty than Dektol, which is good.
It is right in the middle between Dektol and Selectol Soft/120
It is like D-52, it is like 130 (without the HQ)
As taught back in the '60s, I decant 20% of the volume of the working solution,
which I add to the new working solution. So, if I use 1.2 liters, I'll make a liter fresh, and add the old stuff.
It is just 'seasoning' and makes it easier to match the prints over a long run.
It supports factorial development, a lot of liquid developers don't.
You can also get dead cold tones. A great, great, great developer.