Cant figure it out Heat stress? Mag Def? Res temp too high? PICS

looks like a mite problem.you should check the bottom of the leaves for black dots

Magnesium (Mg) - Interveinal chlorotic mottling or marbling of the older leaves which proceeds toward the younger leaves as the deficiency becomes more severe. The chlorotic interveinal yellow patches usually occur toward the center of the leaf with the margins being the last to turn yellow. In some crops, the interveinal yellow patches are followed by necrotic spots or patches and marginal scorching of the leaves.
Zinc (Zn) - In some plants, the interveinal chloratic mottling first appears on the older leaves and in others, it appears on the immature leaves. It eventually affects the growing points of all plants. The interveinal chlorotic mottling may be the same as that for iron and manganese execpt for the development of exceptionally small leaves. When zinc deficiency onset is sudden, such as the zinc left out of the nutrient solution, the chlorosis can appear identical to that of iron and manganese without the little leaf.

leaves that are falling off could be nitrogen too.
Nitrogen (N) - Restricted growth of tops and roots and especially lateral shoots. Plants become spindly with general chlorosis of entire plant to a light green and then a yellowing of older leaves which proceeds toward younger leaves. Older leaves defoliate early.

Mg can get locked-up by too much Ca, Cl or ammonium nitrogen. Don't overdo Mg or you'll lock up other nutrients.

View attachment 1713629

Malboro, Calcium on the right, Magnesium on the left, explains it better than words ever could, not what i think is happening here but keep a hold of this chart for future use if you want, it helps identify cal/mag very quick. Peace

the little dotes r bugs eating yr plant ,are the leafs dyeing off or r they staying the same?

I know my camara sucks so you cant really see well. I've had mites and thats not what this is. I was thinking along the lines of a deficiancy as well. Im currently adding 10ml/gal of cal mag. I guess ill boost it a little more and keep an eye on it. How would i correct a zinc def?

the leaves begin to look kind of streaked, discolored between the veins. They take on pale shades. Nobody thinks it could be heat stress?

Heat stress usually makes the leaves fold like a taco

Cheers brother!
You will need a chiller! Anything above 70f should have a chiller or at least be religious about adding h202. every 3 days. Your deficiencies are caused by lockout, 6.0ph is good as long as you are trusting your meter. If not try to start a little lower at 5.8. I had so many problems with meters that I switched back to the drops, piss yellow works like a charm every time ha. Your temps are fine for veg as long as airflow and ventilation is proper. Co2 is useless when the plants are stressed, cut back to ambient levels until the plants get healthy. That also goes for light intensity. Nothing likes to be in full sun when not feeling good.
A basic res change would be a good idea, but then make sure your perimeters are right, that also includes runoff from the table. BTW, if 10ml of cal-mag does not fix a cal-mag issue you are locked out!!!
A pic of the whole plant would be good.

Good luck,
Kind

great info untity. when i get to my house ill post a pic of the whole plant. Im using CAP ebb and grow system and i'm wondering what you mean by the table runoff perimeter. Im gonna work on getting this chiller hooked up for now. I might have gone a little overboard 1/2 HP econochiller for $500! I didnt look at how it is set up and was hoping i could cool both rezs (as I'm running 3 systems and have 2 in flower at any given point) because they will have the same ph and ppm the majority of the time. i might still be able to do that with 2 pumps and a Y hose connector. Anybody done this?

cuddy.j said:

great info untity. when i get to my house ill post a pic of the whole plant. Im using CAP ebb and grow system and i'm wondering what you mean by the table runoff perimeter. Im gonna work on getting this chiller hooked up for now. I might have gone a little overboard 1/2 HP econochiller for $500! I didnt look at how it is set up and was hoping i could cool both rezs (as I'm running 3 systems and have 2 in flower at any given point) because they will have the same ph and ppm the majority of the time. i might still be able to do that with 2 pumps and a Y hose connector. Anybody done this?

Click to expand...

Depending on how big your resis are, 1/2 hp chiller will most likely be overkill. So, you can certaily cool 2 or 3 resis with it. There is a easy way to cool 3 resis running different nute formulas with one chiller, but it gets a bit complicated, and will require acurate sizing of 3 seperate cold water coils. Instead of cooling the res content (nute formula) directly, you run a cold water loop from the chiller through the 3 cold water coils, which are located in the 3 resis, and from there back to the chiller. You kind a want to talk to a HVAC guy to help you out with the configuration if you want to go down this road. I have a a little sketch attached, so you can see the basic idea. There are important piping elements left out of the sketch, so keep that in mind

Kind