Im using bio-bizz all-mix organic soil and im on my second bag first bag was good but this second bag seems to really hold alot of water too much if u ask me the drainage isnt good enough and I dont want to add loads more perlite, i was thinkin of adding coir to my soil mix anyway cuz i wanna get max air too my roots and have better drainage so i get agood runoff wen i water the plants, wot do u guys (and gals) think about this??? i have heard that u can only use coir specific nutes for coir?? Some input on this wud be grately appriciated