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what material do you use for ph adjustment

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what material do you use for ph adjustment

Postby brantoken » Tue Nov 26, 2013 10:46 am

I have been using potassium bicarbonate, and it works great, but it is really expensive.
What material is safe and what is everyone else using?
Things I have considered, but am not convinced of yet.
calcium carbonate
dolomitic lime.
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Re: what material do you use for ph adjustment

Postby Sambedded » Tue Nov 26, 2013 11:35 am

I'm using calcium carbonate. (ie chalk) . Works greate and tasteless. Dolomitic lome gives a taste offset and may contain some zinc and/or lead.
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Re: what material do you use for ph adjustment

Postby brantoken » Tue Nov 26, 2013 3:18 pm

Ok I must be nuts online a 50lb bag of calcium carbonate goes for anywhere from 8$ to $200 with 50$ shipping .
Where do you pick up a cheap bag in the United States, masonry supply sporting goods ?
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Re: what material do you use for ph adjustment

Postby Sambedded » Tue Nov 26, 2013 9:32 pm

I got my 50Lb for around $15 at Coastal Farm & Ranch (gardening department)
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Re: what material do you use for ph adjustment

Postby varocketry » Tue Nov 26, 2013 11:53 pm

www.dudadiesel.com had the best calcium carbonate prices when I bought ten pounds. Shipping is free.
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Re: what material do you use for ph adjustment

Postby cemik1 » Wed Nov 27, 2013 12:16 am

Orthophosphoric acid pH↓
Caustic soda pH↑
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Re: what material do you use for ph adjustment

Postby jake_leg » Wed Nov 27, 2013 1:26 am

CaCO3 is a bit difficult to get in solution, Cal = Ca(OH)2 is easier to work with.

50% KOH (hydroponic pH up) for big adjustments.
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Re: what material do you use for ph adjustment

Postby brantoken » Wed Nov 27, 2013 8:19 am

Thanks Guys , that should save a me a nickel or two. I'll use the potassium bicarbonate for small adjustment from now on. It does work well with no taste but for large adjustment it take way too much. Still need to find out which one is cheaper for me to obtain in my area.

Also wondering , The potassium bicarbonate is a buffer and keep thing within a certain ph range. I am guessing lye and quick lime and potassium hydroxide are not , or at least I can find them mentioned as buffers anywhere . Is this correct? So I need to be much more careful in my adjustments. I am not a chemist, please excuse my ignorance.
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Re: what material do you use for ph adjustment

Postby Kapea » Wed Nov 27, 2013 10:05 am

Potassium and sodium hydroxides are strong bases. Extra care needs to be taken when using them. If you get some in your eyes the damage cannot be undone.

Sodium hydroxide = lye = caustic soda
Potassium hydroxide = caustic potash
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Re: what material do you use for ph adjustment

Postby brantoken » Wed Nov 27, 2013 10:29 am

I went straight to the web to research, already knew lye is nothing to play. I did notice and read the MSDS, Yes I need to find some protocols for the endeavor, before I goof up and damage myself. Also can imagine, You could get some violent reactions with too strong a mixture in a fermenting wash. Like boil over out the vessel kind of thing. Already made that mistake once with the potassium bicarbonate, way too many bubble like overflowing my frigging fermentation vessel kind. Huge mess, and I won't do that again. Any advise here? I would guess mix with a large amount of water and slowly add, anybody got some percentages?
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