> there is a magnesium deficiency
how are you diagnosing that? leaf spots (yes, thats Mg deficiency imho), or just loss of green between the veins?
Ive heard of that before with Canna Aqua, and they advise adding epsom salts. foliar is an excellent way to inject nutes into a plant.
> n=99 p=43 k=302 Mg=33 earlier in this thread your numbers were
n=138 p=60 k=316 Mg=42 can you tell me why the numbers are different????
the spreasheet has an option to check the "use weights" box. if you enter a weight, even if its just a guess, like copying the weight of Flora Bloom, the numbers come out stronger. this is especially true for thick nutes, like FloraNova
congrats on your spreadsheet work
> Does the lucas formula using Gh flora nova bloom 8ml n=124 p=108 k=180 Mg=62
yes, if you have entered the weight of FNB as 1.4666 and you check the box to use weights
> (With targets of 100-100-200-60 with a run off ec of 2.0) apply to NFT channels with a constant feed????
the Mel Frank nute levels were tested for both ebb flow and bubblers, and I consider biobuckets and nft similar, because they all essentially bathe the roots in nutes either constantly, or constantly flushing with fresh nutes.
for high density medium, like coco, or synthetic soil mixes like sunshine, or even potting soil, I recommend an entirely different strategy.. which is to irrigate with 1/3 strength of Mel Frank's levels. The reasoning is that the nutes dont flush through the medium entirely, and instead accumulate over time..
irrigation of medium is an excercise in controlling accumulations, which is where flushing comes in. I dont think flushing applies to dwc, ebb flow, nft, or biobuckets..
and btw, check out my signature link Against Bubblers, for more interesting tangents on biobuckets..
> (using PBPB@15 plus Cal Mag@5ml/gal) started adding BioNova P13-K14.
why fix it if it aint broke?
> would this give me a good npk ratio through the rest of flowering?
your PBP recipe is already fully functional. Adding more P will lock out Mg, which PBP has precious little of. Adding K is not necessary either, PBP Bloom is higher in K than GH Bloom products.
the people I know that add PK 13-14 are having endless loops with pH issues, nute overdoses, and in general, everything you dont want.
the only way I recommend using PK 13-14 is if you follow a manufacturer's guidelines for the rest of their nutes program. That is a Canna strategy.
mixing and matching nutes brands and products will have you flying blind in no time, unless you learn to input all your nutes into pH's spreadsheet, then learn the baseline target values for nutes, by studying the recipes I opened this thread with.
I recommend choosing ONE of the recipes I posted, they all work.
bottom line insight for me is, plants dont EAT, so feeding them more food is a bad thing. I think plants use the minerals in nutrients as electrical conductors. In the same vein, since plants dont eat, they also dont produce waste products the way we normally think of eating food and excreteing waste.
Autotrophic plants use light energy to make all the organic compounds they
require from carbon dioxide, water, and about 14 mineral nutrients they absorb
from their environment. Therefore, they don't really produce metabolic wastes
bottom line is its more important to control for the gasses, than the minerals. Oxygen is absolutely vital to roots, and carbon dioxide is absolutely vital to leaves. Therefore, airflow, air temp, co2 delivery, oxygenating the root zone, and lighting, are all more significant variables on yield than nutrients.
my advice is to pick a successful gardening mentor, copy their nutes, or pick a manufacturer, and follow their nutes program. then set aside nutrient concerns and focus on optimizing the environment.