Completely lost on what is literally sucking the life outta my plant

[SlyBoy420]

I got this black truffle clone on dec 31 this is my first attempt at indoor growing so I’ve been trying my best to read up and learn how to at least keep a plant alive and to flower but whatever I’m doing is seriously wrong. I feel like everything started out good. I used ffof in 3 gal fabric pots I got humidity around 50 I’ve got intake and exhaust running. Temp is normally 76 degrees Fahrenheit. I’m running a 480w spider farmer g5000 at the moment it’s running 50% at like 30 inches above canopy Before the plant started going to hell I had it set at 25% at probably 20 inches above canopy and my light meter said it was roughly 450 ppfd. A couple weeks ago I started to add fox farm grow big 6-4-4 and ff big bloom I was mixing based on what u need to mix a gal but I usually only mixed a half gal at a time. And I was shooting for a ph of 6 after nutes were added or even even using straight water. Like I really thought the plant was looking good and growing all right thought the color was nice and all of a sudden it’s like the leaves started getting a little pale and I also kind of look like they had stripes in them. The only place where there’s still some OK green looking leaves is more towards the center of the plant I’ve grown outside for the past couple years and to be honest, I never really keep too much track of the soil pH or anything like that that’s going on with the plants. I typically just start with Fox farm and then run of a fox farm regiment. Whatever the bottle says all the way out through Bloom and it seemed to usually work for me. I usually even start my small plants inside in the spring using a 480 W mh and didn’t have any issues. I even did it in a dark damp basement and didn’t have any of the equipment like I do now the lights, the humidifiers the tent I figured pending this money with the basic knowledge I’d be able to at least grow some reg so far I’m doing good. Just to keep a plant alive.
I’m gonna post a few pictures from when the plant started to where it’s at now if anybody just has any ideas on what I am doing wrong or something I need to change. All criticism and help is graciously appreciated.

 

[OldOneEye]

I have 2 questions
What have the temps been?
How often have you been watering?

 

[SlyBoy420]

I have 2 questions
What have the temps been?
How often have you been watering?

Temps during the day 76 or so and tbh during the dark period I’m not sure. And typically I water when the pot feels light or I dig down about an inch or so and if it feels dry I give em a drink but I’m guessing every 3 days probably on water

 

[OldOneEye]

When I see a plant that looks like that I see heat, over watering to the point of root rot.

 

[Florida_Mike]

Agree w/ one eye. Definitely looks like soggy roots causing them to cower
and causing nutrient lock out.

Dark veins + purple stems + interveinal chlorosis & rusting = classic mg deficiency,
prolly nutrient lock out caused by root problems.

 

[goner]

these guys are on it.

i have plants looking like that I'm experimenting with. i have gone over a week without watering them in half gallon pots and they are just now starting to perk back up.

 

[RoyalCannaSeedbank]

She is drowning

 

[Galgrows]

Yes she needs to dry out i only water/feed in my 3gal every 4-5days and i lift them to judge i don't go by the finger test. Try doing less feed and watering as she's looking overfed and watered. She'll bounce back. And i'd like to say also some strains need bigger pots, get a 5 gallon next time and keep them off the floor put them on risers.