Just because we like to confuse folks, there are a few of us here that have tried several combinations and while MedCzech is correct according to Autopots documentation, it is not what myself and pop22 now recommend after many grows. Check out his post right above yours by Pop22 where he mentions using 70% soil, 30% coco. We are both recommending a combo of soil and coco to have the soil help buffer any issues. I’m currently testing soil and perlite in the same 70/30 mix and it seems to be about the same as soil/coco. I don’t use any hydroton on the bottom either, cannabis doesn’t seem to care one way or the other. Although, I do recommend use of the airdomes if you can.
If you are going to use all coco or coco/perlite do yourself a favor and add some dolomite lime to the mix because you will almost always have cal/mag deficiencies with coco as the primary. I use about a half cup of lime to every 5 gallons of medium. No lime? Prebuffer your medium with a good dose of cal/mag and be prepared to use it for most of your grow.
I love DP’s genetics grew quite a few of their auto mazars and indoors never had one go less than 100 days. Some I swear could just keep on going if you fed them the right nutes. I liked that one so much it quickly went on my reversing schedule and created a few seeds for the collection.
