Hydro Ph blues

WarEagleWeed · #1 (**permalink**) 03-28-2009, 09:10 PM

this is my 2nd DWC grow on CFL. my seedlings are three weeks old and the oldest leaves are yellowing and dying due to what i believe is Ph burn. i've been using 1/4 tsp nutes per measured gallon of water which is under manf suggestion just to be sure thats not the problem. when i flush the water i adjust the ph of the 7.8ph tap water down to 6.8 after nutes are added using an aquarium ph down...BUT the next day i check and its back to 7.8 repeatedly, is this because of the aquarium agent, should i use a mineral instead? all help is appreciated.

ppaatt · #2 (**permalink**) 03-29-2009, 07:54 AM

I am having the same problem and it driving me nuts. Iam now trying to leave the water in an other holding tank for 2 to 3 days untill the ph stabizes. And i am lowering the ph more to get the range i want. still testing diffrent things but if i find out anything that works better i will post it. i hope someone else has come up with a better anwser. good luck with it.

SmknVTEC · #3 (**permalink**) 03-29-2009, 07:56 AM

If it fluctuates up than lower it to a pH of 5.0 to get the desired 5.5 for hydro.

xamoman · #4 (**permalink**) 03-29-2009, 10:43 PM

i am having the same problem. i have been trying to lower my ph with vinegar but it keeps going up again to 7.2. tomorrow i am going to try and change the water out and use my well water instead of the tap water. my well is in a pine forest and has a ph of 6 to 6.5. i hope this will do the trick . my plants are only 13 days old and they are already getting brown edges.

SmknVTEC · #5 (**permalink**) 03-30-2009, 06:39 AM

Vinegar should not be used in hydro only for soil.

xamoman · #6 (**permalink**) 03-30-2009, 08:11 AM

Quote:

Originally Posted by SmknVTEC

Vinegar should not be used in hydro only for soil.

are there other household items i can use until i can buy some good stuff?

Mr.GoodStuff · #7 (**permalink**) 03-30-2009, 08:36 AM

^ Household items suck in my experience for controlling pH, especially in hydroponics. Lemon juice or vinegar smells and does not control the pH well at all. Baking soda is extremely salty.

The aquarium shop should have very inexpensive bottles of pH up and down for tiny little fishbowls. The stuff at the hydro shop is for plants though and should work better, even though it's more expensive.

If you cannot afford pH up and down, you should take a step back from growing hydroponically for a minute. Try soil and organics. Water the plant with carbon filtered water and you don't have to worry about pH as much if at all.

xamoman · #8 (**permalink**) 03-30-2009, 05:56 PM

Quote:

Originally Posted by Mr.GoodStuff

^ Household items suck in my experience for controlling pH, especially in hydroponics. Lemon juice or vinegar smells and does not control the pH well at all. Baking soda is extremely salty.

The aquarium shop should have very inexpensive bottles of pH up and down for tiny little fishbowls. The stuff at the hydro shop is for plants though and should work better, even though it's more expensive.

If you cannot afford pH up and down, you should take a step back from growing hydroponically for a minute. Try soil and organics. Water the plant with carbon filtered water and you don't have to worry about pH as much if at all.

thanks for your reply. its not really a question of money. here in norway they dont sell anything special in local stores. i have to order through the internett. it takes abought a week before i have it.

SmknVTEC · #9 (**permalink**) 03-31-2009, 06:57 AM

Quote:

Originally Posted by Mr.GoodStuff

^ Household items suck in my experience for controlling pH, especially in hydroponics. Lemon juice or vinegar smells and does not control the pH well at all. Baking soda is extremely salty.

The aquarium shop should have very inexpensive bottles of pH up and down for tiny little fishbowls. The stuff at the hydro shop is for plants though and should work better, even though it's more expensive.

If you cannot afford pH up and down, you should take a step back from growing hydroponically for a minute. Try soil and organics. Water the plant with carbon filtered water and you don't have to worry about pH as much if at all.

I completely agree with everything Mr.G says.
If you have the money get some liquid pH up or down from an online hydro store. GH Makes great products.

xamoman · #10 (**permalink**) 03-31-2009, 05:57 PM

could my problem be that i didnt rinse the rockwool blocks good enough? i left them in running water for half an hour. if so is there anything i can do to fix this?

xamoman · #11 (**permalink**) 03-31-2009, 10:21 PM

dose anyone have experience with general hydro... ph down in powder form. what would you recomend powder or liquid
http://www.eurohydro.com/regul_ph.html

SmknVTEC · #12 (**permalink**) 04-02-2009, 07:24 AM

Quote:

Originally Posted by xamoman

could my problem be that i didnt rinse the rockwool blocks good enough? i left them in running water for half an hour. if so is there anything i can do to fix this?

Yes that can cause pH fluctuations. Not sure what to do. Just soak them in pH water longer.

Quote:

Originally Posted by xamoman

dose anyone have experience with general hydro... ph down in powder form. what would you recomend powder or liquid
http://www.eurohydro.com/regul_ph.html

yes I do the powder works great in soil but doesn't hold shit for hydro. Use liquid for hydro.

xamoman · #13 (**permalink**) 04-06-2009, 02:09 PM

Quote:

Originally Posted by SmknVTEC

Yes that can cause pH fluctuations. Not sure what to do. Just soak them in pH water longer.

yes I do the powder works great in soil but doesn't hold shit for hydro. Use liquid for hydro.

i have ordered liquid but it dosnt look like i am getting it before easter.
would it be better to use cleen water with no nutes until i can adjust the ph properly?

SmknVTEC · #14 (**permalink**) 04-06-2009, 10:53 PM

Well if it is way off the nutes won't be taken up fully anyway. Might be better to save them until it comes. When is Easter?

xamoman · #15 (**permalink**) 04-06-2009, 11:16 PM

Quote:

Originally Posted by SmknVTEC

Well if it is way off the nutes won't be taken up fully anyway. Might be better to save them until it comes. When is Easter?

i have run fresh water through the rockwool and mixed up a solution of 1/4 strength. easter starts on thursday and lasts until monday next week.

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#1 (permalink) 03-28-2009, 09:10 PM
WarEagleWeed Registered User Join Date: Jun 2008 Posts: 27	Hydro Ph blues this is my 2nd DWC grow on CFL. my seedlings are three weeks old and the oldest leaves are yellowing and dying due to what i believe is Ph burn. i've been using 1/4 tsp nutes per measured gallon of water which is under manf suggestion just to be sure thats not the problem. when i flush the water i adjust the ph of the 7.8ph tap water down to 6.8 after nutes are added using an aquarium ph down...BUT the next day i check and its back to 7.8 repeatedly, is this because of the aquarium agent, should i use a mineral instead? all help is appreciated. __________________ I do not use marijuana or any other drug nor do I condone their use.

#2 (permalink) 03-29-2009, 07:54 AM
ppaatt Registered User Join Date: Mar 2009 Posts: 8	Re: Hydro Ph blues I am having the same problem and it driving me nuts. Iam now trying to leave the water in an other holding tank for 2 to 3 days untill the ph stabizes. And i am lowering the ph more to get the range i want. still testing diffrent things but if i find out anything that works better i will post it. i hope someone else has come up with a better anwser. good luck with it.

#3 (permalink) 03-29-2009, 07:56 AM
SmknVTEC Moderator Extraordinaire Join Date: May 2003 Location: Tornado Alley Posts: 8,092	If it fluctuates up than lower it to a pH of 5.0 to get the desired 5.5 for hydro. __________________ "I build cars for young men that only old men can afford"- Enzo Ferrari (1898-1988) LED Thread PGAMG Thread MG vs. Generic Soil Current and Legit Seedbanks GC Forum Rules

#4 (permalink) 03-29-2009, 10:43 PM
xamoman Bronze member Join Date: Feb 2009 Posts: 45	Re: Hydro Ph blues i am having the same problem. i have been trying to lower my ph with vinegar but it keeps going up again to 7.2. tomorrow i am going to try and change the water out and use my well water instead of the tap water. my well is in a pine forest and has a ph of 6 to 6.5. i hope this will do the trick . my plants are only 13 days old and they are already getting brown edges.

#5 (permalink) 03-30-2009, 06:39 AM
SmknVTEC Moderator Extraordinaire Join Date: May 2003 Location: Tornado Alley Posts: 8,092	Vinegar should not be used in hydro only for soil. __________________ "I build cars for young men that only old men can afford"- Enzo Ferrari (1898-1988) LED Thread PGAMG Thread MG vs. Generic Soil Current and Legit Seedbanks GC Forum Rules

#7 (permalink) 03-30-2009, 08:36 AM
Mr.GoodStuff Would Love To Get High Join Date: Apr 2007 Location: Somewhere between a rock and a hard place- but the food is great, the view is great, and the bed is really soft! Posts: 2,689	Re: Hydro Ph blues ^ Household items suck in my experience for controlling pH, especially in hydroponics. Lemon juice or vinegar smells and does not control the pH well at all. Baking soda is extremely salty. The aquarium shop should have very inexpensive bottles of pH up and down for tiny little fishbowls. The stuff at the hydro shop is for plants though and should work better, even though it's more expensive. If you cannot afford pH up and down, you should take a step back from growing hydroponically for a minute. Try soil and organics. Water the plant with carbon filtered water and you don't have to worry about pH as much if at all. __________________ No distractions- and there is only the truth to see. *Here We Grow Again* Mazar & Blueberry Hydro Grow My Brother's River System Last edited by Mr.GoodStuff; 03-30-2009 at 08:38 AM.

#10 (permalink) 03-31-2009, 05:57 PM
xamoman Bronze member Join Date: Feb 2009 Posts: 45	Re: Hydro Ph blues could my problem be that i didnt rinse the rockwool blocks good enough? i left them in running water for half an hour. if so is there anything i can do to fix this?

#11 (permalink) 03-31-2009, 10:21 PM
xamoman Bronze member Join Date: Feb 2009 Posts: 45	Re: Hydro Ph blues dose anyone have experience with general hydro... ph down in powder form. what would you recomend powder or liquid http://www.eurohydro.com/regul_ph.html

#14 (permalink) 04-06-2009, 10:53 PM
SmknVTEC Moderator Extraordinaire Join Date: May 2003 Location: Tornado Alley Posts: 8,092	Well if it is way off the nutes won't be taken up fully anyway. Might be better to save them until it comes. When is Easter? __________________ "I build cars for young men that only old men can afford"- Enzo Ferrari (1898-1988) LED Thread PGAMG Thread MG vs. Generic Soil Current and Legit Seedbanks GC Forum Rules

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