collegegardener88March 27, 2008

Hi all,

I am new to the world of hydroponic gardening. I started about 2 months ago with the Emily's Garden hydrogarden, and I seem to be having a pH problem. I use vinegar to lower my pH. It works in the short term, but after a brief drop in my nutrient solution's pH, the pH climbs right back up to the 7.5 to 8 range, requiring more vinegar. It seems to be "stuck" in this range, if you will, and I am not sure what to do about it. My tap water is usually around 6 pH or so.

I use pre-mixed nutrient solution called Flora Nova by General Hydroponics. Will this alter the pH of my tap water?

Is vinegar an acceptable form of pH adjuster?

What should I do?

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greystoke(South Africa(11))

collegegardener88 wrote:
Is vinegar an acceptable form of pH adjuster?

It is - I use nothing else - but it is a weak acid and it wont work well on nutrients that are heavily buffered.
Aerating your nutrient with a fisktank bubbler will help. The air bubbles will remove the CO2-gas released by the acid.

    Bookmark   March 27, 2008 at 11:51PM
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What medium are you using?
I have yet to meet a nutrient solution that didn't lower the pH. I use GH's 3 part liquid flora series and it always lowers the pH a point or so.
If your tap water is 6 and it rises(lowers the acidity) it seems there must be something else affecting the pH. What else can you tell us about your system?

    Bookmark   March 28, 2008 at 7:13AM
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Vinegar/baking soda (calcium carbonate) works poorly with commercial nutrient solutions. Ph up and Ph down, available from most hydro places, controls Ph much better. Start there.

    Bookmark   March 29, 2008 at 9:29AM
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