Slight yellowing of seedling leaves

[cnw1970]

Hi all! I'm currently growing indoors. 4x4, AC Infinity S44 Ionboard 400-watt LED grow light, AC Infinity 4 inch Cloudline exhaust system, growing in Promix HP, watering with tap water at 6.5 PH, using Homegrown Cannabis Co's basic nutrient package. 77 degrees with 75% humidity. Growing 5 plants in 5 gal. fabric pots. Started noticing some yellowing between the veins. Is this the start of a magnesium deficiency or am I making a big deal out of nothing??

 

[Keffka]

Looks a little like nutes to me.. are you using them full strength according to the directions? Typically the amount on the package is a bit heavy in strength and people start at half strength.

 

[Keffka]

Mag deficiency looks a little more like this.. like the color is being sucked out of the plant.. in my experience yellowing is caused by nutes

 

[cnw1970]

Mag deficiency looks a little more like this.. like the color is being sucked out of the plant.. in my experience yellowing is caused by nutes

I'm pretty sure that I figured it out. My runoff PPM's ranged from 1200-1500. So I checked my nutes and I read the chart wrong. I was supposed to mix 4 grams into 8 liters of water. I mixed 4 grams into 1 gallon. So I believe it's overfeeding. Glad the nute was a mild seedling booster or I might have been in real trouble. Flushed with PHed water until they read 550-600 ppm then gave them a light feeding after the flush.