I faithfully use Orca /Great white..... Not because I've actually seen any proven, documented with belts and suspenders comparison grows, but because all available science tell me it works....and I got a whole box full for free, enough to use it liberally for years.... And the last nagging doubt I had was put more or less to rest a few days ago, as I also use neem cake in every pot/grow system
https://www.autoflower.org/threads/...growers-best-friend.47977/page-3#post-1450215..... I had lingering concerns about what the neem compounds might do to the myco critters....
As far as comparison grows go, and these are my own less than stringent minimum requirements for accepting the word "comparison" has any meaning at all with plants grown from seeds rather than clones(the pheno type debacle)......
Anythings less in both the active and control groups of XX plants, under the exact same environmental parameters, will indicate
< 5 plants = an inkling
<10 " = a perception
<25 " = a reasonable idea
<50 " = now we're talking
>99 " = we're getting somewhere
This repeated many times = pretty close to being factual knowledge....
All this is based on many trials and comparisons with fruits and flowers over 20 years with reseach Institutes involved from the US, the Netherlands, New Zealand, Chile, etc.....admittedly no cannabis involved , but I've no reason to think testing parameters should be less rigorous for cannabis than other plants.....
Sure, comparative grows are fun but the value of doing it with a few plants in a grow space without completely controlled lab grade environmental parameters is...... ermmmm...... Debatable...... To put it mildly!