The difference HPS makes FROM CFLs

Aljazera

Active Member
Well, I wanted to you update you guys on my skinny plant problem. I purchased HPS lights off second hand and put them in the room. Not only did it look like I was in Mars, but look at the difference just 2 days makes when adding this 400W HPS to this bad seed:

Photo Jan 11, 6 10 04 PM.jpgPhoto Jan 11, 6 10 11 PM.jpgPhoto Jan 11, 6 10 15 PM.jpgPhoto Jan 11, 6 10 23 PM.jpgPhoto Jan 15, 3 22 17 PM.jpgPhoto Jan 15, 3 22 25 PM.jpgPhoto Jan 15, 3 22 40 PM.jpgPhoto Jan 15, 3 22 49 PM.jpg

I did notice one thing. My ppms for tap water were 250-300ppm and I had always been feeding them around 690 PPM (including the tap water PPMs), So I raised the PPM to 980 last night and I see a slight nute burn on the older leaves just starting to form. Anyway for me to stop this from continuing? Or is it normal since I increased the PPms almost double from 300 to 700 and it will just equilibrate on its own?
 
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