Oyster Shell Flour in Coco ROLS Mix?

I know Oyster Shell Flour (OSF) is used with peat due to the low pH, but with the ROLS coco mix I'm working on do I need 1 full cup/cuft?

Here is the base mix:
3 parts cal/mag charged coco coir
3 parts perlite
3 parts earth worm castings (EWC)-- will also be topping w/ additional & every 30 days
1 part biochar inoculated with fish emulsions and/or vermicompost leachate

Amendments (per cubic foot):
1 c basalt rock dust
1 c glacial rock dust
1 c gypsum
1 c OSF
1/2 c kelp meal
1/2 c crab meal
1/2 c alfalfa meal
1/4 c malted barley powder (MBP)-- will also be topping w/ additional & every 30 days
1/8 c neem seed meal-- will also be topping w/ additional & every 30 days
Will also be topping w/ 1/4 c banana peel powder and 1/4 c fish bone meal at transition
Initial watering will contain coconut water, unsulphured molasses and liquid humics/fulvics-- afterwards it will be dechlorinated tap water.

How did it go?

That was a long time ago but here goes…
I changed the soil formula considerably. I dropped the 3 parts of coco for 3 parts of peat. For aeration I now use 3 parts of a 50/50 mix of pumice and long fiber coco coir (not the peat). I also add 3 parts of a 50/50 mix of EWC and compost. That’s my base.

I dropped the banana peel… though it’s worked for me in the past, I decided against it. Maybe I’ll try again at some point.

No liquid humcs/fulvics.

Just plain tap water.

I went a bit crazy on the rest…
In order of most to least:
Biochar, calcium bentonite, glacial rock dust, gypsum, oyster shell flour, diatomaceous earth, greensand for my “rocks”.

Kelp meal, crustacean meal, alfalfa meal, insect Frass, mbp, fish bone meal, neem seed meal, karanja seed meal, sul-po-mag and mosquito bits.

It’s in a 27 gallon diy auto-watering sip in a 1 square meter tent scrog. I top feed once a month for now with the fallen leaves and some amendments depending on her stage. It’s covered with contractor grade black trash bags. When I lift it up to look at the soil it’s loaded with life.

Attached are pics from a month ago. This is the second run in this soil.

Nice looking good!