How the keep DTW res PH stable?

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Bookush34

Well-Known Member
I am working up to a automated watering system for a DTW Hempy system.

I have been keeping my nutes mixed in a 5gal bucket with a Airstone to see how long my nutes stay stable.

I am on hard well water where I am. Here is what my Temp Rez dose.
Nutes = FloraNova Grow/Bloom, KoolBloom, Bud Factory X, Cal/Mag.

Tap PH 7.2-7.4
Add nutes
Set PH in bucket to 6.0
24 hrs later PH is back to 7 +/_
Set it back to 6.0
then it creeps up over night again but to maybe 6.8

The PH rise overnight gets less over 3-5days.

I have read that the issue could be my Hard water?

What can I do to keep my feed more stable?
Different nute company?
RO filter?
 
projectinfo

projectinfo

Well-Known Member
R/o would help.

Bubble your tp water for a day or two till it stabilizes then add your nutes .

If you use Benny's they'll slowly raise your ph.

Mixing nutes is a crap shoot. Some have buffering agents some don't.
 
Rahz

Rahz

Well-Known Member
PH can swing up or down depending on the fertilizer, specifically the type of nitrogen used. You probably have a lot of nitrate nitrogen in your fert so when it's absorbed by the plant the PH will go up.

It's nothing to worry about, but I would suggest starting your solution at 5.5. That way you'll get a swing up to around 6.5 covering the whole usable PH range. As your plant get's into the flowering stage and is using less nitrogen the PH will quit swinging as much, but there will typically always be some swing.
 
rkymtnman

rkymtnman

Well-Known Member
Bookush34 said:
I am working up to a automated watering system for a DTW Hempy system.
Click to expand...
i did the same with my hempys. now i'm doing autofeed GH waterfarms.

i preferred a waterfall in my dtw res vs air stones.

i used GH floranova bloom in RO/well mix or plain RO. i'd skip the cal/mg, bud blasters, and the koolbloom. FNBloom is all you need.

mine is stable for at least a week.

i prefer maxibloom now. the FN bloom started solidifying into crystals in the jar. didn't want to fool with that anymore. one part nutes are known for that.
 
Lordhooha

Lordhooha

Well-Known Member
When my water comes from my well the ph will be lower than when I let it sit for a day to come up to room temp. Then I ph.
 
B

Bookush34

Well-Known Member
I have put just plain water in my Rez now. Ph’d it. And over night I had the same climb. So I assume it’s a water issue.

I will keep the plain ph’d water going and see what it dose.
 
Lordhooha

Lordhooha

Well-Known Member
Bookush34 said:
I have put just plain water in my Rez now. Ph’d it. And over night I had the same climb. So I assume it’s a water issue.

I will keep the plain ph’d water going and see what it dose.
Click to expand...
Ph it AFTER it sits for 24 or so hours depending on your res size. Ph will change as the temp goes up or down.
 
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B

Bookush34

Well-Known Member
UPDATE:
I needed some more PH down a while ago.
hydo store was out of GH so I picked up Advanced Nutrients PH down

way more concentrated use about 1/8 the amount compared to GH.

PH set to 5.9 and only rose to 6.1 in 8 days.

SUCESS
 
projectinfo

projectinfo

Well-Known Member
PS. I find ph up or down easier to use when I dilute it in a 4gal jug and then I just splash some of the new solution and check after a few mins.. Works good enough and it's quick and easy to eyeball after you do it a few times.

My 2c :)
 
projectinfo

projectinfo

Well-Known Member
Do
Bookush34 said:
I now have a 20gal Rez.
But I mix up a batch of nutes in a 5gal bucket and top up my Rez.
Click to expand...
Do you add straight undiluted ph up or down after you add nutrients to any bucket, container, resevoir?

A drastic spike in ph can cause your nutrients to precipitate is all I'm saying.

Something to watch for
 
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