Hiya BBCheese... what base vs additive ratio are you mixing and are you using the whole line up? Your plants look really great, how tall are they? Are you saying you only using 450 ppm in flower? Oh and those roots look magnificent! Are you using H2o2 or bennies? Im suprised the nutes aren't coloring your roots more... Sorry for the 20 questions ..gotta dig to get to the details..= )
Hey brother ask away... I am here because I went through it all and had massive issues with DWC until I dialed it in.
Here is my soup recipe in vegetation and flower.
Vegetation
(I usually veg until the plant is about 12-15 inches tall).
I monitor my plants daily for ppm changes so it varies per plant. I start at about 50 ppm for seedlings/cuttlings until they have like 4 or 5 true nodes. Then it goes to 100 - 150 - 200 to 250 usually max until I flower, I usually up it per week depending on what ppm's read. As you know different strains require different nute ratios.
What I use:
RO Water (10ppm start)
Advanced Nutrients A+B Sensi Grow (PH Perfect Blossom bottle)
Botanicare Cal-Mag
Advanced Nutrients Voodoo Juice
Botanicare Aqua Shield
I use beneficial bacteria all through vegetation. I tried H2O2 and Zone through vegetation while it worked but the roots really need beneficial bacteria I noticed, the roots get so much bigger, abundant and whiter with beneficial bacteria vs not having it in vegetation. I stop the beneficial in flower and switch to Zone and little H2O2 for flower for remainder of the plants life.
I do have AN B-52, Hygrozyme, Super Thrive to name a few other additives I used that worked but didn't give the results I was looking for. I think I pretty much tried everything trying to figure out DWC from Stinkbud system.
One thing I did learn and it is gospel now is "Less is More" and I was killing my plants with the AN Sensi using way too much, I mean nothing even remotely close to what they were saying on their nute calculator. This is
*NOT* a bad thing though as I use less and still see GREAT results.
Flowering (Plants are usually 36-48" tall - the bubblegum in picture is about 42" tall and still growing a bit at little over 30 days flowering. I have yet to go over 450ppm in flower although many others use greater ppm effectively my plants would look great at high ppm's then begin to stop growing and eventually start to stunt and stop growing. The plants looked great (no leaf burn) but the roots were never nice and white and full, they were getting burnt and dying thus stopping growth. I kept dropping the ppms till the plants roots stayed nice, white and growing which seemed like a ridiculously low amount but it works and works awesome.
Flower soup:
Advanced Nutes Sensi Bloom (PH Perfect Blossom bottle)
Dutchmasters Zone Gold
Botanicare Cal-Mag
Advanced Nutes Big Bud / Botanicare Hydroplex (still working on which one I like better)
The ppm in flower is 400-450 most of the time monitored daily and adjusted.
I change my buckets out when I think they need it, sometimes weekly and sometimes monthly. I keep everything clean and adjusted so it's never been an issue yet. Ya with the lower ppms the roots don't get colored and even higher ppm with advanced it doesn't discolor too much. Bene's are gone at this point and its only Zone (awesome product for DWC) and the nutes from here on out. I add the bud boosters in week 3 and 5 of flowering usually.