Ok, I expected problems!

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Here's the way I see it. I don't know what the instructions are on the back of the container for calmag, but you want to follow those directions. Usually when you have lush green leaves with some tips turning yellow/brown, they have too much fert and you're getting fert burn.

The minimum amount to add of cal-mag was 1 tsp per gallon, and for "accelerated response" it said to add 2 tsp per gallon. I think that problem has been solved. But another one came up which I will adress with the next quote

So the question is, what soil did you put them in, and have you given any other fert?

I put them in the soil you recomennded, FoxFarm Ocean Forest potting soil.
And I did not add any other nutes or fert which was acually pretty cheap at the hydrostore :thumbsup:

Oh shit, I just re-read your older post and saw you've used bat guano in the past. If this was retained by the roots and then put in good potting soil, this could create an over-fert condition. A flush is probably called for, about a gallon of water per pot, if the guano was retained. Or you could simply do nothing and just let it ride to see if it gets worse. If so, then flush. Also, it's a good idea to wear sunglasses when working with metal halide lighting because they put out hard UV rays which are bad for your eyes.

Yeah I used bat guano. I asked somebody at a small hydro store and he recommended that (before I looked on forums). I stopped using that when I found this website. Thanks for the heads up with the MH bulb, I had no idea. I think I will flush them, I see really nice green which I havnt seen in a long time, but like you said... the burn. I know its not heat stress or that they are too close to the bulb. So it has to be the fert.

If this problem continues, would it be worth starting from scratch with the proper ferts and soil? I have had these thingsgoing for 7-8 weeks in VEG.... thats terrible I wish I had pics of how bad they were when I got them from the despencory.