Can you identify this problem?

[donbronzi]

Over the last few days 3 of my plants (but 1 in particular) are showing signs of illness. This is now becoming a real problem as new growth is being effected, its is brown spots spreading from the leaves veins. I have attached a pic or 2!

where the plants live

Help please.

 

[Antics]

How to Ask for Grow Support

REQUIRED INFORMATION FOR GROW SUPPORT

What Strain is it?
Is it Indica, Sativa or Hybrid? What percentages?
How Many Plants?
Is it in Vegetative or Flowering Stage?
If in Vegetative Stage... How Long?
If in Flowering Stage... How Long?
Indoor or Outdoor?
Soil or Hydro?
If Hydro, Reservoir size?
If Hydro, Reservoir Temperature?
If Hydro, what type of Medium?
If Hydro, what type of Setup?
If Soil... What is in your Mix?
If Soil... What Size Pot?
Size (Wattage) of Light? How Many?
Is it Air Cooled?
Temperature of Room/Cabinet?
RH of Room/Cabinet?
PH of Medium or Reservoir?
Any Pests?
How Often are you Watering?
Type and Strength of Fertilizers used?
Size or Square Footage of Room?

This information is necessary for accurate support to be given.

 

[donbronzi]

Wow, reckon you've been flamed before then... Soil, not sure what strain or what percentage in/sat. Bio buzz, 1ml bloom and 3ml veg per L water. Feed every other watering every other day, 4x80w hans panels.

The marks on the leaves are quite pronounced, can't believe no one has ever seen this before? I'm going with MG deficiency and adding epsom salts to a foiler spray and flushing the soil through with 20 l of PHed rain water.

Thanks for your help...

 

[Antics]

Flamed? No, not here. It just helps to have a complete rundown of the grow so we can accurately diagnose the problem.

What is PH?

If PH is good I'd think it could be Phosphorous? I've never seen magnesium like that.
It could also be excess Calcium or excess aluminum causing a lockout of P.

 

[donbronzi]

Thanks mate, i have given it a thorough wash through and have treated with epsom salts for now. Bloody nightmare, its acting so quickly!!

 

[Antics]

Yeah some problems just appear over night and just keep advancing quickly.

Just keep an eye on your PH, make sure it's stable, and watch your leaves closely the next few days. If the problem continues advancing, we have a little more work to do. If the problem stops advancing, then you have it all fixed up. Most problems won't be repairable, in terms of leaf damage, but no need to cut them off. Let them keep working for the plant, as they have stored nutrients the plant can use.

 

[kraw420]

Looks like a combo of Cal/Mg and Boron Deficiency