Help Don't Know What To Do

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this brown spotting/growth has been goin on for 2 weeks. i had a ph problem it was well below 3 ph. i cleaned out the entire system and even hand washed the roots. i added another solution at 1/3rd strength. but still having problems even tho its been about 3-4 days. i usually spray with a mild cal mag/water mix. very low dose. i spray atleast twice a week. but stopped and been using just plain tap and the only time i spray is 1hr after lights out. lately i have been having humidity problems too. its been around 25-30%. i have been adding spray to the walls all times during the day n night. i just learned the towel method so am doing that now.
the nutes i have been using are in the mixing orde in the above pic (L-R).
the lights im using is a 150 MH in the top of cabinet and a 2ft T5 system in the side corner. i know the MH isnt good but its all i have for now, i actually think the T5 is doing more than my MH.
i have an exhaust and intake they are both 4in 185cfm booster fans from home depot. the intake i only use during light hrs. is this bad? should i use 24/7 ?
also the stems of the fan leaves ae purpleish but only the top of the stem where light hits, also some leaves are starting to get purple in them. im not sure the genes of this strain cause its bag seed.
i apppreciate any help. thx everyone.

sry i forgot to say that the temps are pretty high. during the day above the light is 87F and the base of plant is 81F and at night it is about 75-77 through out the cabinet. i did the hand test and nothing is getting burnt. im pretty positive anyways.

You giving them any Magnesium?

probably not if it isnt in those nute bottles in the pics. what do you suggest i get? im completly new to this and found out just recently that i have to mix nutes in certain orders. so i have heard/read anyways. im lost when it comes to nutes and feeding charts. i havent found any examples of what to use and how to use it. any advice is welcome.

How much of the CalMag do you use?

2 ML pg. plus a foliar spray about twice a week maybe three. not too heavy, just enough to wet every thing

The leaf curling parallel to the mid rib might be from overwatering. The damage in between leaf veins looks like Magnesium deficiency. I'd try giving them more CalMag and less water. Also, try to bring the temps down a little.

not to be rude but im using a hydroponic dwc system. how can i water less ? unless you mean foliar spraying.

sry one of my pics got deleted. im using a hydroponic dwc setup. should i stop folia spray ? humidity has been around 30% the past few days. its cold and dry out so im having trbl right now but realy working on it.

Heat and overwatering often go hand in hand. More heat=more water evaporating=higher humidity=easier to overwater. There should be a separate word to encompass both conditions and their effect on one another. If they're getting too much water and/or heat, there are a few things that can be done. Obviously any spraying can be eliminated but humidity has a major impact on water intake as well. More fresh air can be brought in to lower humidity. The DWC area can be more isolated from the air in the grow area. I'd focus on the heat first because decreasing water can decrease the plant's ability to deal with heat.

Stop foliar feeding them. Other than that just make sure that your pH is right and don't over feed them.

so because of the high heat and low humidity = more water intake of the plant therfore over watering its self ?
this low humidity has only been for like 2 days. the rest of the issue has been goin on for about 2 weeks slowly progressing to where it is now.
the curling is only on those messed up brown spotted leafs. not all the leafs look like that.
would you like to see pics of the plant up close ? i will do when the lights are on.
some of the new growth has purple in the veins is this ok in some strains ? this is bag seed growing so unsure of the genes

The low humidity shouldn't be having any negative effect. If anything, lower humidity is a good thing. If you think about it, living in DWC, being sprayed and if there was higher humidity, the plant would practically be living underwater. Definately stop spraying awhile.

Purple veins might happen with Phosphorus deficiency or cold nights.

tbo said:

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this brown spotting/growth has been goin on for 2 weeks. i had a ph problem it was well below 3 ph. i cleaned out the entire system and even hand washed the roots. i added another solution at 1/3rd strength. but

still having problems even tho its been about 3-4 days

Click to expand...

. i usually spray with a mild cal mag/water mix. very low dose. i spray atleast twice a week. but stopped and been using just plain tap and the only time i spray is 1hr after lights out. lately i have been having humidity problems too. its been around 25-30%. i have been adding spray to the walls all times during the day n night. i just learned the towel method so am doing that now.
the nutes i have been using are in the mixing orde in the above pic (L-R).
the lights im using is a 150 MH in the top of cabinet and a 2ft T5 system in the side corner. i know the MH isnt good but its all i have for now, i actually think the T5 is doing more than my MH.
i have an exhaust and intake they are both 4in 185cfm booster fans from home depot. the intake i only use during light hrs. is this bad? should i use 24/7 ?
also the stems of the fan leaves ae purpleish but only the top of the stem where light hits, also some leaves are starting to get purple in them. im not sure the genes of this strain cause its bag seed.
i apppreciate any help. thx everyone.

Click to expand...

could take up to 2 weeks if damaged enough.