Hi, new to growing - This is my high pressure aeroponics setup

Hi
Happy Thanksgiving.
I should have been clearer. I was referring to the plant food. I was asking what to buy, how to mix it, and ppm ect.

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So, last Sunday I tried to kill my plants again. I paused the timer and forgot to restart it for over 8 hours. My DLI is just under 30, so when I restarted the timer and checked the roots. They were line sewing threads with all of the hairs gone. Even the leaves looked blasted. I decided that there was no harm in seeing if they would survive. The roots aren't white, necrosis is what I think that I have seen this color called. The roots did grow some hairs back and the leaves grew, slowly, but grow. 2 days ago I finally got what seems to be a reliable PH meter. My PH was just over 5, ouch. I added .5 grams of baking powder to raise it to 6. Yesterday I saw new healthy white roots growing from new spots higher up on the tap root.
My question is, should I trim off the necrosis roots that survived? They are very thin and don't look healthy. Although, they are not looking worse, just stagnant.

All of these white roots are what got blasted. The darker portion is where the new healthy roots are growing out of.

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Wrecked11 said:
I had my doubts but it works great
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Wow, I was all set to place my order with Athena. I was going to order Grow A and B for $90 plus tax. When I got to the check out page, they wanted $27 for shipping! That's almost 33% of the order amount! I said F that noise and did a Google search. All of the companies had similar outrageous shipping costs. So, I went to trusty old Amazon, and bingo! Both 1 gallon of Grow A and Grow B for $63 combined. I also ordered CAMG and Balance at $31.50 a piece. I am actually glad that Athena didn't have free shipping. I'll use Athena for my pot plants and use the Aerogel and CloneX for flowers and vegetables so it doesn't go to waste. Thank you for your recommendation. $31.50 per gallon is cheaper than Aerogel. Which now only comes in 8 Oz bottles for $16 if I remember correctly.
 
If I may, I'd like to add that baking soda (Sodium Bicarbonate) isn't an optimal compound to raise pH with because of the sodium. Hydroponic pH Up is made with Potassium Hydroxide, with possibly some Potassium Carbonate, Potassium Silicate and colorants.
 
BeccaBuds said:
If I may, I'd like to add that baking soda (Sodium Bicarbonate) isn't an optimal compound to raise pH with because of the sodium. Hydroponic pH Up is made with Potassium Hydroxide, with possibly some Potassium Carbonate, Potassium Silicate and colorants.
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I only had to raise it once. I have been using distilled white vinegar to lower ph. Is that also a bad choice?
 
waytoofaded said:
The acetic acid in vinager volatizes easily, so it works initially but will wear off as it doesn't have any buffering capabilities. Citric acid would be better if you have any on hand.
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I'll second that. General Hydroponics pH Down is phosphoric acid, citric acid, and mono ammonium phosphate. In high enough concentrations, acetic acid will not only kill plants, it will develop photographic film.

Note in both cases, pH Up and pH Down, the main ingredients, potassium and phosphorus, are primary plant nutrients.
 
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