I wouldn't be looking for liquid organic nutrients for coco. Something like a one part nutrient like MegaCrop 1 part or MaxiBloom might be you best bet as a new grower.
The other problem you're going to run into is, how much dry amendments are still in that coco? Adding more nutrients on top of what's in there is bound to create issues but you can give it a shot. May take a little bit before they recover.
When growing normally in coco it should always stay wet, always be feed with nutrients, and always fed to runoff that doesn't stay in contact with the bottom of the pots.