Looking for advice on leaf condition!!!

Hi Everybody,

This is my 1st hydroponic indoor grow. I currently have 6 plants (3 White Widows and 3 AK47). Purchased the seeds on the internet from overseas. This week I started to notice rusty/metallic/copper colored spots with yellowing of the leaves. These are located on the fan leaves. Please click on the pics to get an enlarge view of them. I've read a few different threads, but I'm not really sure what to do at this point. Any feedback would be appreciated. Thanks for reading!:bigsmoke:

H=Hydro
C=No
S=No
L=No
R=Yes, 4 inch RockWool cube
T=Yes, 4 inch RockWool cube is buried in a 1 gallon bucket of HydroTon
D=Yes, drip sytem with 2 drip stakes for each plant
E= Total of 6 plants (all 4.5 weeks old from germination)


E-indoor
E-hydroponic
E-Hydroton
CSL-none
HCL-Hydroponic drip system
SCL-N/A
SCLR-N/A
E-5 Gallon Reservoir
E-Approximately 5.5 to 6.5
HRT-Tap water using Ph Down
E-4.5 weeks (Veg)
E-N/A
E-Watering 4 times a day at 15 minute intervals
E-Lamp with 8 T5 bulbs (2ft) and 2 23 Watt CFL bulbs (5500K)
E-Day temp: 75 - 80 degrees; Night temp: 71 to 73 degrees
HD-75 to 80 degrees
E-60%
E-18/6
E-Open window with carbon scrubber w/180 CFM fan
TR-Did you pre-soak your media in pH corrected solution? Yes

what nutrients/additives are you using?

-shake

Hi Mr. Shake,

I'm using the Botanicare Pro Blend Pro Grow 3-2-4. Even though the plants are 4.5 weeks old and approximately 10 inches tall, i'm only using enough dosage for a seedling. I'll probably increase the dosage to the mid-size vegetative next week. Thanks!

sorry, server error.

what nutrients/additives are you using?

-shake

try adding Cal-Mag+ to your water, looks like some calcium deficiency, maybe magnesium, too ... try 10ml/gallon at first, may be able to cut to 5ml, after a week, or two ... get a magnifying glass, and keep an eye on undersides of leaves, check for critters, too, while you're at it ... good growing :jointsmile:

Mr. Shake, I'm actually using the Botanicare Pro Blend Grow 3-2-4.

Image Reaper, thank you for the feedback. I'll attempt the Cal-Mag+ this weekend. Hopefully, this will be the end of that. :greenthumb:

I'll post pics in a week or so for an update. Sometimes, I wish we had health insurance for our plants!!!:pimp:

do you have hard water?

yes, where I live (southern california) has pretty hard water. I use the pH down to get it between 5.0 to 6.0.

Here are some recent photos of my plants at 5.5 weeks into veg. They're currently in their 1st week of flowering. I think after the calmag, soaking the hydroton and sanitizing the reservoir and hydroponic system, the plants seem to be getting better. Thanks for everybody's feedback!