alot of questions about coco

Hi everybody, i got a friend who wanna start growing in coco but needs some info, thanks in advance if you could help,

drain to waste sounds abit better then recirculate but its a waste of nutrients, we notice that in a recirculate system, the ph and salt is hight, would this be ok for the plants? (we didnt realy notice eny differents in a soil grow, no yellowing of leaf or nut burnts ect, pulled 7 o per tree and thats with recirculate system)

in coco would you have to flood the pots several times to get it completly water coverage inside the pot or just flood it onces and it would be even?

how many L of nutrients would you have to water for a 20L bucket? pure coco with 10-15% drainage?

on a drain to waste system, would it be ok if we watered with nutes, then plain water then back to nutes then plain water ect, or do you reckon with nutes all the way, and flush it with water onces a week?

what would be the best nutes to go with? we got the complete line of house and gardens that hasnt been tested yet, but is willing to try other stuff too,

coco vs dwc both 20L buckets whitch would yeild more? same temp, light, ect,

eny body got eny tips or tricks that has enything to do with coco?

i'm sure people use it in different ways, but i just put coco in smartpots and watered/fed them like i would soil, just a little more often. i had them sitting in a large kiddie pool, let the runoff sit there for a few hours, then use a wetvac to suck out the excess. same technique for flushing. put some soil amendments in there to start with.

don't forget to sterilize that shit. whiteflies from a bag of coco ruined my grow last year. i think you can bake it (temp?) or stick it in an airtight black garbage bag and set it in the sun for a few days (if it's still warm where you are).

thanks for the advice bud, not many people grow coco on this forum, we deff need a coc section