Sandra's first grow...HELP MY PLANTS ARE DYING

Well I'll start of with the basics. I'm growing in soil that is being reused but sterilized(Yes I know a big no no) with T5 lights. They have been fed and watered. The strains are Girl Scout Cookie Fem, AK-48, and Blue Mystic.
I feed with Alaskan Fish Fertiliser, Armor Si, and Bio Cozyme. The Bennies I used was HydroGuard.

The problems...
It's experiencing major Necrosis, dark leaves like nitrogen toxicity, yellow leaves like lack of nitrogen. It doesn't seem mobile as it just appeared on the leaves randomly. When I got a soil ph meter I noticed the levels were really low ( high 3 low 4). I flushed the plants until the water ran clear then added dolmite and bennies to each one. The ph picked up to mid 5.

GSC2
30 days from seed
Last Fed: Janurary 6tb
Last Watered: Janurary 30th when transplanted with dolmite and bennies
Soil ph right now: 4.7
BeforeView attachment 4084447
AfterView attachment 4084450

GSC4
32 days from seed
Last Fed: Janurary 20th
Last Watered: Janurary 30tb when transplanted with dolmite and bennies
Soil ph right now: 4.8
BeforeView attachment 4084454
AfterView attachment 4084456

Ak3
32 days from seed
Last Fed: Never fed just watered
Last Watered: Janurary 30th when transplanted with dolmite and bennies
Soil ph right now: 5.0
BeforeView attachment 4084459
AfterView attachment 4084460

BM1
32 days from seed
Last Fed: Janurary 4th
Last Watered: Janurary 30th when transplanted with dolmite and bennies
Soil ph right now: 4.0
Before
After

Plant X
54 days from seed
Last Fed: Janurary 30th
Last Watered: Janurary 23rd
Soil ph right now: 5.5
Before
After

Some back story on Plant X she was part of my initial grow that got attacked by damping off. She managed to fight it off so I kept her around.

GSC2
Before
After

GSC4
Before
After

Ak3
Before
After

And then there is the DWC in
5 gallons of water
ph stays between 5.8-6.2
20-20-20 hydro fertilizer and hydroguard
Water temp 71
Ppms between 4-500
Dedicated 2 outlet air pump into a Ait air stone
leaves turning brown from the oldest to newest starting at the tips and working it's way inward
more recently the leaves started to turn pale yellow like nitro defencity

You gotta get your soil ph right up to 6.5 then see what happens

yes get those p.h. levels up. at those low levels they cant uptake nutrients properly and get deficiencies and/or toxicities ..

Any ideas about my DWC? The ph is in range for that but showing the same symptoms as the soil plants

it might be tough but keep the ph anywhere from 5.5 - 6.5 cannabis likes slightly acidic p.h.. to low or to high causes nutrient lock out

what are you using(brand name of nutes) in your dwc?

Precision Hydro 20-20-20 with micro nutrients

how often are you cleaning the res?

are you using tap water , city water, or bottled water..?

Weekly

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what are you using to check the ph in the dwc? you said you used a soil ph meter for your soil
.

A water ph meter

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AndyAzure13 said:

A water ph meter

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a what ph meter? pics please

A water ph meter

quit fucking around... do you want help or not? I want to see your ph meter..

farmerfischer said:

a what ph meter? pics please

Click to expand...

Must get really expensive using strips all the time

That is my fucking ph meter exact one

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AndyAzure13 said:

That is my fucking ph meter exact one

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show me yours... if your going to be less then truthful your not going to get the correct answers .. what type of water are you using.. ? tap?(well water) city (treated water) or bottled water.?