Hi im wondering if anyone can help. I have 5 two week old seedlings of the big bang strain. Soil used is bio-bizz all mix. Seeds were propagated in root riots prop cubes then transfered to 3 gallon containers as soon as they broke surface. I put them straight under a 400watt hps witha supplementry 125 blue cfl. The grow space is two and a half foot by three and a half foot and 9 foot high ceilings. Ph is constant at 7.0 but foot know if my meter is working properly. Relative humidity is at 40 percent and temp is 25C day and 17 to 19C night. Everything seemed to be fine week one but at the start of week two, light brown crisp dry spots started appear in the middle of leaves and some leaftips. Plants have been watered twice and foot seen to be showing overwatered symptoms. Seedlings are 4 to 5 inches tall. Two days bin i changed my 400 watt hps to a 400watt Dual Spectrum Sunmaster. Any advice or help would be very welcome.ta . Soz i cant it photos atm but in on it and should have some soon.
try getting the ph closer to 6.5 for both your water/nute solution and the run off... MJ likes it a tad acidic... i shoot for the 6.5 mark when i water or feed...
Like BB said try to drop the PH a little & here is a link that might help you figure out the problem till you can post some pictures-Bud http://www.icmag.com/ic/showthread.php?t=11688
