Identifiy the problem

[Gen]

good points gluteous.

Gen Reviewed by Gen on 03-30-2006. Identifiy the problem ~800 PPM CalMag + FloraNova Grow PH @ 5.6-5.8 at all times -- Skunk #1 -- These are clones under @ a little over two weeks of vegging - I did find algae in the res, so I changed nute solutions last night -- They are under 18/6 cycle -- Plants are getting progressively worse as time goes by. This seems to mainly effect the fan leaves... Rating: 5

[Zandor]

~800 PPM CalMag + FloraNova Grow
PH @ 5.6-5.8 at all times
-- Skunk #1
-- These are clones under @ a little over two weeks of vegging - I did find algae in the res, so I changed nute solutions last night
-- They are under 18/6 cycle
-- Plants are getting progressively worse as time goes by. This seems to mainly effect the fan leaves...

What does the underside of that leaf look like? Have you looked at it under a 10x to 30x microscope yet?

You may want to do that.

[marx2k]

Gluteus, I am using RO water and am adding CalMag - the plants looked like crap before the CalMag so Im hoping the CalMag will help it out.

Zandor, what am I looking for? Are you thinking it's some sort of pest? What should I look for?

[GluteusMaximus]

....the plants looked like crap before the CalMag so Im hoping the CalMag will help it out.

This tells me that you may be witnessing the results from earlier damage which may already be corrected. The leaf you posted may have incurred the damage back when you didn't have the calmag in your receipe and it's now more obvious since the leaf grew bigger.

What does the rest of the plant look like? Is the new growth showing any signs of spotting? What is your watering frequency? How tall are these plants?.... 800 ppm may be a bit high for a small plant that is trying to recover from an earlier deficiency.

GM

[marx2k]

It seems that as soon as the leaves get to about an inch, the spotting starts on the leaf. It's only been a few days since I changed the res/put in the calmag, so I have to see wether it's helping. This is a DWC system so it's constantly in water. The plants aren't that small anymore. At this point they're about 9-10" tall.

The water temps do get to about 77 before lights out, though. This should be fixed by the time I go to 12/12 (if I go to 12/12) due to the glass shield on the 400HPS reflector and the HPS causes less heat anyway.

As I said, I did have an algae problem. I guess light did get into the water somehow and hopefully it is fixed now. Maybe the algae wasn't letting the nutes get into the roots?

[Chris Seekins]

When the leaves get to about an inch they lose alot of growth cells or auxins. Thrive alive may help replenish and fight off the spoting.

[marx2k]

What is in thrive alive that would help this? I figured GH FloraNova and CalMag should be plenty?

[Chris Seekins]

auxins. New growths have the most growth cells called auxins. Since the leaves and growth rich with auxins do not show signs of sickness I figure it may help. What do you think.

Basically auxins are like fuel for DNA regeneration and are produced from tryptophans

[marx2k]

I think I want to stay away from anything more than what's needed by most everyone else. Usually that's GH FloraNova + CalMag in the case of mine being RO water.

I *did* look at both sides of an affected leaf with a microscope and show no signs of any pests, unless it's a fungus.

I seriously hopes it goes away. And here, I thought it was e-z to go hydro. I wonder if this first attempt is atypical? I mean, everything seems to have gotten into the right range... PPM, PH, etc - also, as I said, the temps have been getting up to 77, 78F in the res. If those temps keep up, I wonder if that will seriously affect the plants.

I have an AC unit in there but I think it needs a fron recharge or something. It's only blowing in the air from the outside without much if any temp change.

[Zandor]

Well then you can cross one problem off your list then and feel safe. What did you say your Ph was?