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Ok, new grow, browning leaf tips, is the light too close? Just the clones are doing this, they do have roots already. mS is under .90 (my water has a base mS of about .25).
It is the old growth that is yellowing, and for the time being the new leaves seem to be coming in fine, but time will tell.
Does that plant have roots yet...?
If that plant has roots then it should stop "yellowing" and start growing VERY fast..
If it does not have roots yet.. then it looks normal...
: )
If you did not presoak the rock wool the lime content it comes with could be infecting your soil and skyrocketing the ph.
ms stands for microseimen. I think you may be talking E.C.
1 EC = 700 ppm
700 ppm = 1400 microseimens
What are you feeding?
Soaked for about 4-6 hours, the seed plants are not exhibiting this. I'm feeding Grow Big and Earth Juice Catalyst.
The humic acid in EJ catalyst should help stablize the ph.
How much would you recommend using? It's similar to Liquid Karma. I'm using about 1/8th cup to 15 gallons right now.
That's actually only about half of what they recommend as a weak strength, however I've learned with regular nutes it's best to give a small amount rather than alot.
But I suppose, it's organic so it might be safe to go to a higher concentration?
The half life of humic acid is measured in centuries.
Yes, but that doesn't say what concentration should be used in a hydro reservoir ;-)
MOuntain... roots or no roots?
I could see nice roots coming from the jiffy pots before I transplanted to the hydro. New leaf growth is coming in, and thus far it's healthy.
looks like normal sacrificing of the lower leaves to feed the new growth. Unsightly, but natural. Plants do that when they aren't taking up nutes for any reason -- no roots, plugged roots, stagnant medium, no nutes in the medium, bad ph, etc. The real question is: is the new growth coming in normal? Looks to me like it is. Wait till you have about 3 nodes going above the brown leaves and then trim them out. The uglies will be a memory in a couple days. . .