BioBizz Coco mix?

you should have some sort of drainage amendment in there -- perlite, vermiculite, et al... not too chunky, either. you dont want to physically impede roots significantly. so no #4 perlite or huge clay balls (hydroton has different sizes). 2:1 coco : perlite (or similar) 70/30 is often pre-packaged, that is fine too.. dont have to be exact on this but should be close. it provides best aeration and virtually impossible to drown your roots without extremely bad behaviour. can you still grow in 100% mix without anything else? sure... it'll compact and it will impact rate of growth eventually if not from day 1. If you do go this route i'd be extra religious about allowing it to dry a bit before re-irrigating. in coco i usually wait for top layer to start changing colors, but you may want to wait for top 1/2" to dry or so... unless plant looks droopy near end of that cycle, adjust accordingly. definitely avoid a tiny plany in a big pot contxt as all the issues are exacerbatd by poor drainage qualities of substrate.