Quote Originally Posted by volak
OK...im propper panicking now..take a look at these pics.

I raised the nute level to..

30ml grow
20ml micro
10 ml bloom

PH has been kept between 5.5 and 6.2

As you can see, they are starting to get very yellow on the tips and side margins..and some are showing chlorosis in the inter veinal areas.

Looking like either Zinc, Iron or Magnesium deficiency.

How can this be when all the various nutrients are available and the PH is fine ? I have ruled out heat stress too as i have a coolshade lamp.

I have been using the PYTHOFF too.

Any opinions would be greatly appreciated.
Magnesium Deficiency for sure.......

Original Post my MynameStitch

Solution to fixing a Magnesium deficiency
Any Chemical/Organic nutrients that have Magnesium in them will fix a Magnesium deficiency. (Only mixing at ½ strength when using chemical nutrients or it will cause nutrient burn!)
Other nutrients that have magnesium in them are: Epsom salts, which is fast absorption. Dolomite lime and or garden lime (same thing just called different) which is slow absorption. Sulfate of Potash, Magnesia which is medium absorption. Worm Castings, which is slow absorption. Crabshell which is slow absorption. Earth Juice Mircoblast, which is fast acting. (a must buy!! Has lots of 2ndary nutrients).
Now if you added to much chemical nutrients and or organics,( which is hard to burn your plants when using organics) You need to Flush the soil with plain water. You need to use 2 times as much water as the size of the pot, for example: If you have a 5 gallon pot and need to flush it, you need to use 10 gallons of water to rinse out the soil good enough to get rid of excessive nutrients.

That above is a way to fix it from a thread I was reading on another forum and happened to see this one too.