Just an idea.. Instead of feeding by ml's measure what ppm the nutes and water are mixed.. It's ok to go near full strength with advance nutes if your plant can handle the ppm, but it's recommended to start off slow then work up..
I just flipped to flower after veg for 9 weeks from seed and my ppm is 640 i know that 30ml of each part a&b sensi comes to 590ppm and 50 ppm is tap water.. That's half recommended dose on my bottles. Also advance nutes with the ph perfect can only be used and dumped they don't work well when just topped up.
Srry can't help you out on the deficency side as I haven't had and problems yet
You dont feed by ml's. What you should do to be efficient as well as cost effective for your nutrients is to develop a feeding schedule for certain phases of the plants life.
For instance, i use Gen Hydro's 3 part Flora Series along with GH Florablend, GH ArmorSi (silica) Botanicare Cal/Mag + and Botanicare's Aquashield.
I start with a base: 16L of water for my DWC buckets, and 36L of water for my grow box. Thats 4 gallons or 9 gallons.
To that base i add (everytime):
4ml/gal Florablend
4ml/gal Cal/Mag +
1.5ml/gal ArmorSi
10ml/gal Aquashield
Then for each stage of the plants life i have amounts for the Grow, Micro and Bloom ratios
I add in parts. Each "part" is 5ml. This is Parts per Gallon. e.g. 2 parts = 10ml. 2 parts will equal 10ml times the amount of gallons you are mixing for.
VEG:
2 parts Grow
2 parts Micro
1 Part Bloom
I then will add plain, PH balanced water to adjust my PPM to 400-600 depending on how long the plant has been in veg for. I will max out at 700PPM for veg (thats a little high for me, but strain dependent)
For Seedlings and rooted clones i will dilute it further to about 250-400PPM
TRANSITION: (1 week before and 2 weeks into flower)
2 parts Grow
3 parts Micro
3 parts Bloom
Adjust PPM to 500-800
FROM 3rd WEEK UNTIL FLUSH:
2 parts Grow
3 parts Micro
5 parts Bloom
Adjust PPM to 700-1100 depending on what your plant can handle (i wouldn't suggest going over 1000).
This is just what works for me so far. I am continuing to tweak the amounts in my "parts" so that i dont have to add water to my mix and dilute my nutrient strength to the PPM i trying to achieve. I'm getting closer. For my Transition recipe, i had to add an extra gallon and a half, but thats cause i was soaking rockwool too, so i went a bit higher on the PPM cause i knew i was adding more water, then the left over nutrient mix is going into my grow box.
Thanks for the ideas. Ya the ppm in bucket#1 is high like 1100 with the water (my water is hard 300PPM) I had the PPM low for 2 weeks and that's what I think is killing it. I have never been at or above half strength on the AN nuts. I think Ill go to 3/4 strength and see if I get an leaf burn. So far I am only seeing nut def and calmag def. I got rust and spots and light color on the tall 1. Although I did try and add nuts to it and once again you explained that wont work and that's why I am still seeing a problem. So I'll change the water and up the dosage, if it starts to burn I'll just dump a gallon and add water (will that work?) Can I just drain a gallon of overnutruient water and replace with a gallon of clean water Phd? Bucket#2 is working out finally. LSD had 2 tops for sure it just mutated from seed to 2 and what looks like maybe a 3rd top developing (hard to tell) this plant is a mess but it is a survivor. Nuts in bucket #2 are low like PPM600 with the water (water is 300). The other plant in bucket 2 is just green short fat bushy 6 equal height tops but only 3inches tall at best.
Those dark spots you showed in your pictures aren't "rust" spots like i am talking about. The rust spots associated with a calcium deficiency starts at the edges (not the tip)and will scatter on the top of the leaf, not patchy, light green-brown coloured that i saw in your photos that look associated with root issues. those spots could also signify a Phosphorous deficiency, which is also accompanied by reddish or purpling of the stems and petioles of the cannabis plant as well as necrotic spotting like that.
LED grown plants DO require more Calcium and Magnesium than plants grown under HID lighting, but dont overcompensate because you think it needs it.
I know some places in America you can buy bottles of distilled water from the shop for very cheap! ( wish I could get that where I live) IMO you need to get the water ppm down with those nutes else I think you will be running into deficency's left right and center.. I wish more people would say there 2 cents ere!! I don't claim to know it all I'm a newbie myself to dwc
but that's what I've learnt so far.. If I'm wrong I do accept criticism!! Lol
The other option is to buy a RO system, but then the need to supplement with Ca/Mag is greater. But this way, you aren't having a couple hundred dollars worth of nutes sitting on your shelf cause they take your PPMs to the moon and harm the plants!
OR If you are using hard water, i would stop using the Advance Nutrients line of nutes you are currently using and switch over to the General hydroponics 3 Part Flora series, but use the FloraMicro Hardwater formula for water PPM's over 200 instead of the regular FloraMicro
General Hydroponics FloraMicro Hardwater
that is a link to the product page.
This will balance out your high starting PPM and maintain a steady balance in your system. Also, the 3 part Flora series can be used in conjunction with almost all synthetic fertilizers and supplements.
Theres my 2 bits! I like to think i have DWC figured out pretty well.