Your nutrients are not made for cannabis as the NPK ratio listed on parts A and B are for something else. The established NPK ratios for cannabis in hydro are 312 for veg and 132 for flower, generally. Your nutrients have almost no P. In flower, P is the one that gets increased as you see from the ratio. Easy fix is to go to eBay and grab a small 1 lb bag of Mono Potassium Phosphate. It has a weight of 50-52% Phosphate as well as 34% K or Potassium.
Since you've had bad luck picking what I call rip-off nutrients, why not take the minor splish and mix your own. You'll be in control of all the individual levers. You can start with small quantities of individual components purchased online from people who repackage from 50LB bags. Once you decide you like mixing and realize how awesome it is, then you can buy in bulk and save ridiculous money over premixed nonsense. $2/lb avg compared to $25/lb for watered down versions. The items I mix are the same thing found in premixed products. For N use Calcium Nitrate. It has a weight of only 15% N so you will use a lot in comparison to the next one which is P. For P use Mono Potassium Phosphate. For K you can either or both, Potassium Sulphate, sometimes called SOP for Sulphate of Potash. The other K is Potassim Nitrate (KNO3) which dissolves a little easier but is also an oxidizer so I mainly use it for foliar if I feel the need.
For flower, all you really need is N and P because the P has 34% K which works out right for the 132 ratio. You'll also need Magnesium Sulphate which is Epsom Salt, buy at Walgreens etc.
Cal-Mag is nothing more than Calcium Nitrate and Epsom Salt, read the labels.
For mixing you need an electric corded drill and a long paint mixing tool, a scale the measures grams up to 150 or more, some measuring spoons, cups, shooting muffs, and a small flashlight.
Mixing tips which make it fun.
First, make sure you are sitting, not standing. No one wants to be standing around mixing all day. That sucks.
You'll need to be able to load, light, and smoke a bowl or a one hitter with one hand, like your right hand. That's why there's a stay-on button on the drill that makes it easier to hold with one hand, like your left hand.
Fill a 5 gal bucket about half way with water, add your weighed out nutrient of choice. One nutrient per mix bucket, don't mix them in the bucket because of the higher concentration.
Now turn your drill on and start mixing. Hold it with one hand and sit back and start smoking with the other hand. Now is a good time to ponder how lucky you are because how many other people are doing what you're doing. No one. I can guarantee you this.
My 35 gal Bloom system goes like this,
Calcium Nitrate - 160 grams
Mono Potas Phos 145 grams
Potas Sul 0 grams
Magnes Sulph 100 grams
Trace Elements 4-6 grams
Chelated Iron 4-6 grams
For PH up use Potassim Bicarbonate. If my system is at say 5.4 and I can raise it .2-.3 with 5 grams or about 1/2 teaspoon. Add more go higher.
There is huge room for error which is great. Just look how off your nutrients are ratio wise and your plants still made it. But when you dial it in, they really show their love back to you.
