yellowing help please

[suiteflyer]

hello i need help figuring out whats wrong with my plants
I'm growing in a 3x3 hydro hut with a 600 hps I'm using fox farm ocean forest soil pH is @6.2 temp is around 75 deg i use botanicare pure blend pro & super maxb1 for nutrients here are some pix the plants look pretty healthy but there is a little yellowing is this normal thanks for the help

 

[MynameStitch]

Is the tops yellowing? If so get them out of the huts, how long have you had those huts?

They have made a recall about those huts, the plants show or exhibit sulfur deficiencys, because the stomas on the plant close up due to a foreign vapor being released causing the plants to become sickly, can you show a better picture, I can't see the yellowing due to the picture being so dark.

 

[sirgrassalot]

Any pics without the yellow lights?

 

[suiteflyer]

sorry about the bad pix here are some better ones. iv had the hydrohut for a little over a year this is my 4th grow in this tent i haven't ever seen this before thanks for the help

 

[Guest]

tips are getting burnt...too much of somthing?
they are kinda pale all over...maybe too much water.?
i only use the Supermax for early vegg...then lay off it...ive overdone it with Smax in soil...
tweaks em out for a min...then they come back with a vengence..and surpass the ones not treated....

maybe the combination of both are too much now for em...right now...how long befor you filp?

seems something is stopping em from feeding correctly..

 

[suiteflyer]

OK i will lay off the super max. i want to flip soon but I'm not sure if i should correct problem first what do you think