drumin

My setup:
2 - 600watt HPS
AC unit keeps room below 75 degrees
Chiller that keeps my temps no higher than 73 at worst but normally about 70.
Dutchmaster Gold series nutes
R/O water
PH is swings between 6.0 and 5.5
PPM has been from 800 building up to 1900 over a 2 week period.
I use a little less than the max amount of DM "Zone" and DM "Silica"

I'm growing Blue Rhino, Grape Krush x Blueberry and White Widow.

So here's the deal. I've been a soil grower for a few years with excellent success. I decided to go Aeroponics and build a system. It consists of 10 - 5gal buckets with a feed and return. The pump sits in the res and sends water/nutes to the manifold which sends pressurized solution to each bucket. In each bucket is a smaller manifold with 4 jets attached. then the solution flows out the return hoses into the res.
OK
So, my first grow was relatively successful but I think I pruned them too hard which caused some slow growth. But it turned out marginally better (albeit WAY quicker) than the same number of plants in soil.
My second grow was a complete disaster. The veg nutes had gone bad somehow and it basically poisoned the root system and killed all but 2 plants. Those 2 were stunted and produced about 4 ounces total.
This is my third grow and I'm having issues with slow growth and signs that look like deficiency.

Everything seems to me to be perfect but the plants are not responding well.
Only one is (a WW) is just now starting to pick up it's growth but the other 9 are showing signs of deficiency and are growing very slowly. WTF?
Last night I added a 3/4 dose of Hygrozyme.

These picks were taken on 6/17/2009
I'll take new ones today at lights out.

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Pesci

how often is your pump timed to turn on and for how long?
How are you mixing the nutes in the reservoir? Are you following the instructions on the label and putting one in at a time or are you mixing them up all together then putting the solution in the reservoir?

What is the humidity by chance?

Also, I think I see some mg deficiency there. You might want to add 1 teaspoon Mg per one gallon of water

Also, follow the instructions for the hygrozyme. I think its so many mml per gallon.

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im pretty sure hygrozume needs 8-10ml per gallon to be effective, but NEVER over 15ml/gallon.

70 degrees is right on the cusp of pythium temperatures. you need to get that chiller to pull down another 5 degrees or so. 65-70 would be better. always in the 60's is ideal.

also when using HZ i would recomend changing the water at least every other day, if not everyday. as the HZ breaks down the dead nasties there will be all kinda funk floatin around in the res. many claim this to be normal, and just ride it out..by the weeks end your roots should be back to new.

in the future i would try using HZ before the problem starts, instead of waiting till its diseased and trying to recoup it....

root disease will look just like lockout and def. of all kinds. is there any brown snot on the roots? or are they just slightly discolored?

on a side note, what kind fittings are those on the buckets that you used and bulkheads? are they watertight? id love to go to a 9 bucket system instead of a rubbermaid tub, but i cant find bulkheads cheap enough.

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n_d_shadows

Ditto that!

DrDankman

I agree with pesci about the mag def.

some cal-mag should get you in order as long as your RH is not too low.

other then that your stats sound like they are in a good range, and your root system looks healthy. i do notice a little droop in the leaves could be def related.

i would do a res change... add your nutes and then ph to 5.8 it should stay there without swinging.
your PPM shouldn't be rising that much that fast unless either they are drinking a shit ton of water.

are you in flower? or veg?

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drumin

I'm not sure of the exact humidity but I know it's fairly low due to the AC unit keeping the room cool.

I shouldn't be having a micronutrient deficiency with a product like DutchMaster... So I'm hesitant to act on that.

I do follow product directions.

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n_d_shadows

Mg and Ca are not really set in stone, some plants need more and some less but for your plants to be exhibiting all of those deficiencies ( I see lack of N, P and Mg in there) it has to be something different or you just arent feeding them enough...

drumin

I put it in just slightly over 8 the 8ml mark

It's running full bore right now so the temps aren't going to get any lower

If only it were that easy. My system takes about 30 gal of water and since I use R/O water it takes a long time to get 30 gal out and then getting 30 gal out of the system... once a week puts my back out for 2 days. *sigh*

At 40 bucks a bottle that's VERY expensive.

Well they do have a little bit of brown tinge to them as you can see in the pics.

I used cheap irrigation fixtures from lowes. It's the blue/gray fittings for 1/2inch irrigation tubing. One end is male or female (both needed, one inside and one outside the bucket) The other end is barbed for connecting the black irrigation tubing. I just regular rubber garden hose washers on the outside to seal the hole and prevent leaks. Since the water doesn't get above the fitting and there is no pressure there is no leaking with this setup.

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drumin

That's why I'm here! Because I don't know what the problem is... my PPM is pretty high because I thought they looked like they weren't getting enough. I think it has something to do with the roots being infected or something. There is browning going on.

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drumin

Here are the pics from today. The last two are the top and bottom of the one that is growing well.

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"Prohibition...goes beyond the bounds of reason in that it attempts to control a man's appetite by legislation and makes a crime out of things that are not crimes. A prohibition law strikes a blow at the very principles upon which our government was founded." - Abraham Lincoln