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Is this PH problems

Posted by sivrat (My Page) on
Wed, Nov 5, 08 at 12:58


I have been having some issues recently with my hydro.
last saturday, I checked my tank and the PH was at 5.0. The plant seems to have sucked a lot of water, the tank was almost empty, and strangely my Peppers were all looking really good. They have just started to set fruit.

So I changed the nutes, and balanced it back to 6.5, but now the leaves are not so happy

Could this be from the shock of the PH change? or is it some deficiency.

Any ideas?

Follow-Up Postings:

RE: Is this PH problems

I'd say that would be a good guess, that's it quite a swing in PH, but most likely the peppers got burned from such a low PH. Lets see what some of the other members say...


RE: Is this PH problems

Hi Eric,

Thanks for that, I think it must be that too. The only wierd part is that the plant were fine at ph of 5 or so. Do you think the plants will adapt to the new PH, or is this a late onset of PH burn?

Please excuse all the quesitons, this is my first grow in hydro :).

I enjoy your site by the way, have read it often.

Thanks a bunch


RE: Is this PH problems

Yellowing between the veins could also mean a magnesium deficiency. Add a bit of Epsom salt to see if that makes a difference.

RE: Is this PH problems

i'm new to this whole thing myself and i've encountered the same exact problem. except perhaps on a grander scale.
i haven't found a solution yet. and i'm loosing plants.
i have been having problems with the nutrients that i have been using, causing my PH to go down to 4 sometimes. i add the ph up but i hate fighting chemicals with chemicals. when i adjust the ph to 6 it will be at 4 in less then 24 hours. i figured shock was my problem, none the less, i had to transplant to a bigger container. next day rolls around, she's wilting and turning dark. 3 days. dry as a bone not sucking up water. i think she's a goner.
i'm going to keep an eye on this forum for a solution if anyone has any. though i might have done it myself with the transplant, i can't keep the ph up.

RE: Is this PH problems

Try this:
Grow one or two "test plants" in an organic nutrient. I think you'll be pleasantly surprised.

RE: Is this PH problems

I have some experience not sure what type hydroponic system you are using...? I am using a NFT system, I had a sudden fall in PH I kept using 'PH Up' the next day back down... I did lots of research, I discovered I had an anaerobic bacteria (not enough oxygen for the roots) the roots were brown not a bright white like they should be and the leaves were dropping badly. Several factors; left old nutes in too long, the NFT water level was too deep stagnant water(drain tubes not deep enough). I ended up replacing water/nutes and adding H2O2 (hydrogen peroxide) and continue to use H2O2 once a week and have never had any more problems. I change water and nutes every 30 days. I'm on my 3rd batch of lettuce. I have a very happy hydro system.

Here is a link that might be useful: My Lettuce Machine

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