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Old 12-09-2008, 06:00 PM
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Question Cannot Diagnose Plant Symptoms (?)
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I'm using a one part nutrient system ("Sensi One Grow"), with a PH of 7.0...

I'm very careful about over/under watering...

I have a 400 watt HPS...

The big dark green ones were cloned during flowering...

What's wrong with my girls?

(2 Different Species/2 Different Problems)
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Last edited by Under-Mi-Sensi; 12-09-2008 at 06:03 PM..
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Old 12-09-2008, 06:04 PM
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those plants lok to green and your ph should be 5.5 with ppm at 700
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Old 12-09-2008, 06:07 PM
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ph 7.0 way too high for hydro.
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Old 12-09-2008, 06:07 PM
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700 PPM throughout veg? Same for Flowering?

I'll drop my PH, Thanks!
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Old 12-09-2008, 06:20 PM
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My guess is a calcium deficency. Looks like a problem I had and could not figure it out for a while. One plant croaked! I flushed then added Magical then added it to 1/4 strenght nutes for a while and it went away. How is you water. Do you use tap water? I add pond water detox to mine. Also my ph in hydro is 6.5-7.0 so I dont think thats the problem. I think its either calcium deficent or your water. Or both! Just my guess.
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Old 12-09-2008, 06:36 PM
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I agree that this looks like a calcium difficiency in part. It also looks like your girls might not be getting enough water.

I'm not sure if those spots in your pictures are top or bottom leaves, or middle. My guess is middle. That makes me think it'd definitely a mineral def. in part, most likely calcium. If these girls are on 12/12 they should definitely have clear over 1000ppm of sensigrow (which is the same nutes I use.)

What I am sure of, though, is that your pH is too high. You want around 5.5-6.0 for these in a hydro setup.

Good luck dude!
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Old 12-09-2008, 06:44 PM
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im 1000% positive thats a ph problem right there. Go out n grab the book marijuana GARDEN SAVER -- it has pics of every plant problem imagineable, and the solution for everything. Just lower your ph to 5.8, and youll be golden for all new growth
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Old 12-09-2008, 06:46 PM
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Quote:
Originally Posted by SelfSupplied View Post
I agree that this looks like a calcium difficiency in part. It also looks like your girls might not be getting enough water.

I'm not sure if those spots in your pictures are top or bottom leaves, or middle. My guess is middle. That makes me think it'd definitely a mineral def. in part, most likely calcium. If these girls are on 12/12 they should definitely have clear over 1000ppm of sensigrow (which is the same nutes I use.)

What I am sure of, though, is that your pH is too high. You want around 5.5-6.0 for these in a hydro setup.

Good luck dude!
when the ph is off it causes nutes to get loked out thats why pepole have to add supplements to cure the locked out nutes
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Old 12-09-2008, 06:47 PM
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Thanks Guys!
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Old 12-09-2008, 06:56 PM
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I can diagnose 1 other problem> See those small 1" rockwool cubes you put into the 3" ones? see how the small ones are all dark green? That's algae growth. You can cure that by covering all the RW with something that will block out the light. I use tin foil myself since its cheap and works and is easy to mold around the cube.

You have calcium deficiency caused by High PH, calcium starts getting locked out at PH over 6.0 in hydro. Just fix the Ph level and it should all start going well. Adding more calcium at this stage will probably just cause more problems.
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