with coco you only need 33% perlite - i'd recomment #3 vermiculite because it also provides silica.
coco is not magic. It's just a soilless substrate. It only needs 33% compared to sphagnum peat moss's 50% becaues it holds 2/3rds the water per volume.
if it's not buffered, better work out a procedure to soak it a couple times. check out guides on cocoforcannabis.com.
Coco is fine, but there's misinformation out there...
It is not better for the environment. The amount of fresh water to make it useable with plants is very wasteful. Fresh water is 10x more important than some canadian bog, lol. Plants don't grow any faster or slower in it. It doesn't require more calcium - when buffered properly it should not leach or add anything, that's the whole point of a soilless medium. Also, the biology of the plant does not changes because it is in coco, lol. stems are stems, leaves are leaves, they are built the same way and need the same relative amount of inputs.
stick to good soilless methods/procedures and it'll do roughly as well as any other medium. according to simple research by bugbee, it's not as good as sphagnum peat moss. scientific research is 10x more reliable than anecdotal gossip.. and that's being generous to anecdotes. there's a reason why anecdotes never got us out of caveman times, lol, it's completely unreliable.