Ok, I recently got an Octave down pedal, and I'm having quite a bit of fun abusing it. Now, I'm trying to tab out a riff I wrote into GP, and I'm trying to achieve the octave-down sound. My question is, how many steps would I drop the "octave down" guitar to achieve the correct sound? I currently have the octave down guitar tuned to(low to high): B E A D F B (The main guitar is in standard.), but I think I need to go one more step down. Thanks in advance.

EDIT: I'm pretty sure this is where I should post this, but let me know if it isn't