It makes the perfect blend of medium for moisture and air levels....The ORIGINAL Hempy bucket thread, recommended a 75:25 mix (perlite:verm)....Hempy bucket design has been around since the 80ies.....SOME ONE named it and promoted its use...But make no mistake about how long its been around...I started growing in 1979 with STRAIGHT dtw...it was all we knew, AND IT WORKED INCREDIBLE...We use to bust up floral foam to LOOSEN the vermculite, before perlite became more popular, and cheaper to use...We use to put drip trays under the buckets to catch the run off, and then let the plant RECLAIM it for use, before watering again..BUT, having fertile water out in the light ALWAYS was a recipe for algae growth...SOMEWHERE along the way, someone raised the drains holes to keep that 'RUN OFF TRAY' INTERNAL to the bucket...Hempy design...
It went from that to Wick systems (rope inside the bucket hanging out into a res).....THAT TOO, is still a VERY effective, cheap hydro system....
I've been using the perlite:vermculite mix for DECADES and NEVER found ANYTHING that outgrows its or produces buds of higher quality....IT SEEMS ppl Always want to fix something that was NEVER BROKEN to begin with...I've grown with every system known and designed one of my own...AND HAVE COME FULL CIRCLE back to DTW....Its cheap, simple, and cant be beat IMO...THE INDUSTRY spend a lot of $$ to tell less experienced grower OTHERWISE...Hempy IS A DTW SYSTEM but will adjusted drain holes heights to create the internal res to prolong time btw waterings...
DONT BOTHER LAYERING THE SHIT... Will not gain you anything and your messing up the unique air to water ratios that make it such a perfect mix...
ITS NOT BROKEN AND IS MANY DECADES PROVEN...DONT TRY TO CHANGE IT...