Need help don't know what's going on

[gunjababy]

What Strain is it?DP Blueberry
Is it Indica, Sativa or Hybrid? What percentages?
How Many Plants?1
Is it in Vegetative or Flowering Stage?Veg stage
If in Vegetative Stage... How Long?Not sure well over 6 weeks
If in Flowering Stage... How Long?
Indoor or Outdoor?indoor
Soil or Hydro?hydro-DWC
If Hydro, Reservoir size?6-8 gallons
If Hydro, Reservoir Temperature?72 F
If Hydro, what type of Medium?RW
If Hydro, what type of Setup? DWC
If Soil... What is in your Mix?
If Soil... What Size Pot?
Size (Wattage) of Light? How Many?T5 HO Fluorescent Light
Is it Air Cooled?no
Temperature of Room/Cabinet?74 F
RH of Room/Cabinet?30%
PH of Medium or Reservoir?6.2 PH and 518 PPM
Any Pests?not anymore
How Often are you Watering?
Type and Strength of Fertilizers used?All FoxFarm Brand nutes
Size or Square Footage of Room?enough for 1 plant

Problem- I notice spots on the leaves that look like Cal/Mag issues on Wednesday so I added some Cal/mag to my res that day. Today i check On her and things have seem to have gotton worse. Only thing that I have in my res is H2o2 and the 5 tsp of cal/mag I added on wednesday. Can Anybody tell me what's going on ??? I have been going through some problems with the PH too. I can't seem to keep it Steady. Any Ideas or Sugguestions ??

Notice how in this pics the tips are curled up.

HELP ME PLEASE, HELP ME..........

 

[ruello]

Occams Razor .
check ph levels and correct if necessary, cut back nutes and see reaction before going to spend oodles on other guesses like mag deficiency or nute lock. Could be over nute or potassium toxicity.
Flush the system .

you can check out symptoms here....

Marijuana Plant Abuse

 

[gunjababy]

Occams Razor .
check ph levels and correct if necessary, cut back nutes and see reaction before going to spend oodles on other guesses like mag deficiency or nute lock. Could be over nute or potassium toxicity.
Flush the system .

you can check out symptoms here....

Marijuana Plant Abuse

I have troubles everytime I flush, I can't seem to get the PH stable, then that leads to other problems........

 

[gunjababy]

No other opinions ????????????

 

[PrairiePoet]

Not that I know much about anything....
looks like a magnesium to me based from this:
cannabis-plant-pest-problem-solver-pictorial.html

Prairie

 

[ruello]

there are lots of ph up or down solutions. Only problem is some are really concentrated while others are more like adding water.
also a solution called Revive.
Good luck to ya !