Quote Originally Posted by Doremus Scudder View Post

Borax (sodium tetraborate) can be substituted for sodium metaborate in many formulas.

Doremus Scudder
That is generally true, but a borax percentage solution of the same strength as metaborate has a lower pH and is not quite as energetic as an accelerator in developers.
Longer development times to reach the same CI would be expected.

Sandy King