Hidroponic Several Problems - Expert Help

Good afternoon, I have a hydroponic grow a Ak47 3 seeds germinating. I'm in the third week of the growing problem with that affected them all in different

levels aggression.

I tried everything about this in forums and found little about. I am using rock wool as a substrate, but not is the Grodan, bought the 32 www.larocha.com density.

A big problem I noticed that wool is related to PH that each period of 8 hours between one watering and the other (drip), rises between 1.0 and 2.1 above
PH irrigation. Although he left the blocks for 24 hours by adjusting the pH to 5.5 to be balanced in every period of irrigation increases the pH of the
cubes.

Thus, I formulated a table where I adjust the pH of the reservoir according to the PH I collect after watering. I had to collect water separately
irrigation to measure the pH level coming out of the blocks, so I know the value of the pH of the blocks after watering.

Thus, the pH of the blocks that are pH 5.1 for example, after 8 hours climb to 6.2. The reservoir have to leave with pH 4.1 to that at the time of irrigation
stabilize the pH of the block subu to be 6.2 and 5.1 again and then repeat the process.

In this scheme the PH will always rise to the few that forces me every three or four days to regulate the pH of the reservoir again because as the water flows and back pro reservoir, PH goes up gradually.

I did this because my blocks were with PH 7.3 to 7.5 and could not identify because the water coming out of the blocks after the irrigation system and turned pro, changed very little the pH of the reservoir. The reservoir is 15 liters and the water used in irrigation is approximately 2.5 liters.

The most information I got was on foruns that says the problem occurs in my plants is too high pH, which blocks the absorption of some nutrients.

Figure out just after this, I set this system I displayed above to try to always keep an optimal PH of the medium cubes between one watering and the other.
But even doing this about 4 days one of my pants that was more enduring, waiting and started downloading expressed more aggressively to
disease. She was my last hope and now it seems that is moving towards the same fate as the other two.

Symptoms that are analyzed bright green spots that begin to turn brown causing the dryness of the sheet to the point where it crumbles like playing dry leaves. These spots start small and grow and stopping the growth of the plant.

I'm putting a picture of the problem that strikes my sheets and then I'll post a photo of each plant.

Yesterday I spent the cubes of two plants that are best for pots with clay expands. I removed a surface layer of the cube that had a bit of slime
dark green and put in the clay pot with roots in the hope that fix it as fast as possible on the rocks and do not depend on the block.

Also went up a little bulbs to 25cm sistance of the tops. Increased the EC according to the table of GH for the third week of vegetative growth.

Below the event will help the forum thread where I found a problem like mine.
http://boards.cannabis.com/hydroponi...ts-leaves.html

Attachment 279920

I thank anyone who can give some opninion about.

Below is my setup, if they need any more information I am requesting as soon as possible.

Stage: vegetative third week
Light: 27 W x 3 6200K + 3 x 27W 2700K spiral
Current EC: 1.03
Temperature: 24 °C
Drip 8 at 8 (3 times a day)
Nutrients: GH Micro, Gro and Bloom
Cubes of rock wool density 32 to 10 x 10 cm

Quote:

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Originally Posted by Hidrico

Good afternoon, I have a hydroponic grow a Ak47 3 seeds germinating. I'm in the third week of the growing problem with that affected them all in different

levels aggression.

I tried everything about this in forums and found little about. I am using rock wool as a substrate, but not is the Grodan, bought the 32 La Rocha - Indústria de lã de rocha, fibras minerais. density.

A big problem I noticed that wool is related to PH that each period of 8 hours between one watering and the other (drip), rises between 1.0 and 2.1 above
PH irrigation. Although he left the blocks for 24 hours by adjusting the pH to 5.5 to be balanced in every period of irrigation increases the pH of the
cubes.

Thus, I formulated a table where I adjust the pH of the reservoir according to the PH I collect after watering. I had to collect water separately
irrigation to measure the pH level coming out of the blocks, so I know the value of the pH of the blocks after watering.

Thus, the pH of the blocks that are pH 5.1 for example, after 8 hours climb to 6.2. The reservoir have to leave with pH 4.1 to that at the time of irrigation
stabilize the pH of the block subu to be 6.2 and 5.1 again and then repeat the process.

In this scheme the PH will always rise to the few that forces me every three or four days to regulate the pH of the reservoir again because as the water flows and back pro reservoir, PH goes up gradually.

I did this because my blocks were with PH 7.3 to 7.5 and could not identify because the water coming out of the blocks after the irrigation system and turned pro, changed very little the pH of the reservoir. The reservoir is 15 liters and the water used in irrigation is approximately 2.5 liters.

The most information I got was on foruns that says the problem occurs in my plants is too high pH, which blocks the absorption of some nutrients.

Figure out just after this, I set this system I displayed above to try to always keep an optimal PH of the medium cubes between one watering and the other.
But even doing this about 4 days one of my pants that was more enduring, waiting and started downloading expressed more aggressively to
disease. She was my last hope and now it seems that is moving towards the same fate as the other two.

Symptoms that are analyzed bright green spots that begin to turn brown causing the dryness of the sheet to the point where it crumbles like playing dry leaves. These spots start small and grow and stopping the growth of the plant.

I'm putting a picture of the problem that strikes my sheets and then I'll post a photo of each plant.

Yesterday I spent the cubes of two plants that are best for pots with clay expands. I removed a surface layer of the cube that had a bit of slime
dark green and put in the clay pot with roots in the hope that fix it as fast as possible on the rocks and do not depend on the block.

Also went up a little bulbs to 25cm sistance of the tops. Increased the EC according to the table of GH for the third week of vegetative growth.

Below the event will help the forum thread where I found a problem like mine.
http://boards.cannabis.com/hydroponi...ts-leaves.html

Attachment 279920

I thank anyone who can give some opninion about.

Below is my setup, if they need any more information I am requesting as soon as possible.

Stage: vegetative third week
Light: 27 W x 3 6200K + 3 x 27W 2700K spiral
Current EC: 1.03
Temperature: 24 °C
Drip 8 at 8 (3 times a day)
Nutrients: GH Micro, Gro and Bloom
Cubes of rock wool density 32 to 10 x 10 cm

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so your feeding micro,gro and bloom to a seedling and your wondering whats wrong? your ph is rising because of too many nutes. unless im missing something you need to back off the nutes and feed 5.5 water for a week. if your lucky things will turn around. then when things start looking real good just use grow and when your ready for flower start your flower regime after a couple of weeks.

I believe that is not the nutrients, the problem started when the EC was 0.30 (very low).
I'm following this table from General Hydroponics, link below:
http://generalhydroponics.com/site/g...REC-Charts.pdf
I did a test with a rockwool cube placed in pure distilled water and pH adjusted to 4.0 and the next day the pH rises to 6.2.
Lower the pH to 4.0 and again the next day up to 5.8. I'm doing this procedure until it stabilizes. I am almost convinced that the problem is the large amount of moisture that accumulates rockwool, and watered three times a day. I removed the excess water and I am watering with spray directly on the leaves. I read that excess water blocks the absorption of some nutrients, so I added a bit of Mg in the solution to meet the needs that I believe what was happening. I see a positive result, did not notice new spots. In the next week I'll reconnect irrigation to once a day and very little dripping.
Tomorrow more news writing.

First off lets remember that the chart from GH is not set up for what you are trying to grow, the mix is to strong (know from exp). Med hit the nail square on when it was said that nutes to early. Full str nutes should not be used until the 4th set of true leaves appear. From the pic I would say no more than 1/4 str for now. Here is the mix I used and never burned anything Veg 5/5/5 per gal. Flower start 5/2.5/10 this is setup as G/M/B. If you are using any flowering adds like Koolbloom then keep the mix the same and add Koolbloom at 3/4 what package says. If not using an add then after 2nd or 3rd week of flower take bloom to 15.

Quote:

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Originally Posted by tinytoon

First off lets remember that the chart from GH is not set up for what you are trying to grow, the mix is to strong (know from exp). Med hit the nail square on when it was said that nutes to early. Full str nutes should not be used until the 4th set of true leaves appear. From the pic I would say no more than 1/4 str for now. Here is the mix I used and never burned anything Veg 5/5/5 per gal. Flower start 5/2.5/10 this is setup as G/M/B. If you are using any flowering adds like Koolbloom then keep the mix the same and add Koolbloom at 3/4 what package says. If not using an add then after 2nd or 3rd week of flower take bloom to 15.

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thank you. the guidelines are meant for pro growers who know how to compensate. even still you shouldnt feed bloom formula in seedling stage as its unused portions will build up and cause problems.