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Perlite pH problems (danielfp?)

Posted by zandramas none (My Page) on
Tue, Aug 5, 14 at 22:58

Hi, I stumbled across a helpful post awhile back about hydroton pH issues:

http://forums.gardenweb.com/forums/load/hydro/msg100749279742.html?34

Forum member danielfp (I can't PM him!) had a good solution (pun) for dealing with this issue. I'm trying to grow now using perlite and see that there's a climb of about +2.0 pH after water and nutes sit in the bucket of perlite for a day. My question is, will the vinegar solution in the above post work for perlite too? Anyone else have any tips for controlling the pH in perlite?

Thanks!


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RE: Perlite pH problems (danielfp?)

As I understand it, perlite is a volcanic foam - essentially glass - that is pH neutral. (I could be wrong about that.) So the pH shift you are seeing is due to some non-perlite contaminate. I bet if you flush the bucket the pH will stabilize.

Or add an acid, then flush the bucket.

Let us know what you find, please. I grow in dirt-like substances, but I want a mildly acidic medium after adding perlite.

Dennis


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