HELP! Whats happening to my plant?

Temps 29-32c
Lights 2x MARS HYDRO 1000W TS
Tent. 2x4x5
Fans Recently upgraded fans yesterday getting temps 27-29C and have low negative pressure

I did have thrips but I've managed to take care of them with a bit of dish soap 1% water solution and yellow stickies

How high are those lights?

16 inches had the problem when it was 30 inches tho

What are you feeding them?

Not much some magical from technaflora

gillis.222 said:

Temps 29-32c
Lights 2x MARS HYDRO 1000W TS
Tent. 2x4x5
Fans Recently upgraded fans yesterday getting temps 27-29C and have low negative pressure

I did have thrips but I've managed to take care of them with a bit of dish soap 1% water solution and yellow stickies

Click to expand...

Magnesium deficiency!
Get some calmag

ok ty

Bushbaby11 said:

Magnesium deficiency!
Get some calmag

Click to expand...

gillis.222 said:

ok ty

Click to expand...

https://www.technaflora.com/product/magical/

will this work

gillis.222 said:

https://www.technaflora.com/product/magical/

will this work

Click to expand...

Should do?
I use plant magic calmag works perfectly but any should do

gillis.222 said:

Temps 29-32c
Lights 2x MARS HYDRO 1000W TS
Tent. 2x4x5
Fans Recently upgraded fans yesterday getting temps 27-29C and have low negative pressure

I did have thrips but I've managed to take care of them with a bit of dish soap 1% water solution and yellow stickies

Click to expand...

Also if youve any room between your soil and the pot, fill the space with clay pepples or perlite can help to deter creepy Crawleys.

If that is a pre-amended soil, it's highly unlikely you have a magnesium deficiency (or calcium for that matter). If it is mag deficient, it's likely due to improper pH.

It's definitely not an issue with your light, as the lower portions of plant are burnt up too.

It's more likely pH related, or over fertilization. You need to adjust your feeding levels and or pH. Using 6-7 pH water, and making sure your pH remains in that range after adding nutrients (at a lower dosage than manufacturer recommends) is vital to plant health and nutrient uptake.

Look into compost teas.. you'll be able to water your plant, and give it some needed nutrients, without harming it while its healing over the next few weeks. Compost teas can do exactly that. It wont completely heal necrotic areas, but it will help rejuvinate your plant and give it back some vigor.