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10-04-2008, 08:52 PM #1Senior Member
Yellow / brown spots on leafs newbie help
Originally Posted by tomcromp
there should be two small screws somewhere on the meter with 7 and 4 next to them, they are used to ajust your calibration if it needs ajustment.
Meter in fluid 7 ajust to 7.
Meter in fluid 4 ajust to 4.
Meters are very sensitive so be carefull when ajusting the screw, be gentle.
I check my meter for accuracy once a month.
You can buy probe cleaning fluid to clean the probe on your meter.
One more thing don't cross contaminate any of the fluids.
Hope this helps.Greenthing Reviewed by Greenthing on . Yellow / brown spots on leafs newbie help Hello i have yellow/ brown spots on my leaf, i cut the lower leafs off as they where bad and drying out. I have been given it tap water which is ph6.2-8 and today for first time since planting i gave them some nutrients and ph was ph5.4-5.6 humidity 66% 25 degrees Celsius. they are under a 125watt cfl The lights have been on 24 hours I have now turned the light to 18-6 They are 2 G-13's, 1 Blue Cheese and 1 Violator Kush You can look at the pics below Please let me know what you think Rating: 5
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